Category: higt school

Dinosaur Embryos

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Eggs Took 3 to 6 Months to Hatch

Research on the teeth of fossilized dinosaur embryos indicates that the eggs of non-avian dinosaurs took a long time to hatch–between about three and six months. The study, led by scientists at Florida State University, the American Museum of Natural History, and the University of Calgary, was published today in the Proceedings of the National Academy of Sciences and finds that contrary to previous assumptions, dinosaur incubation is more similar to that of typical reptiles than of birds. The work suggests that prolonged incubation may have affected dinosaurs’ ability to compete with more rapidly generating populations of birds, reptiles, and mammals following the mass extinction event that occurred 65 million years ago.

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Credit: © AMNH/M. Ellison
This is a photo of a hatchling Protoceratops andrewsi fossil from the Gobi Desert Ukhaa Tolgod, Mongolia.
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“We know very little about dinosaur embryology, yet it relates to so many aspects of development, life history, and evolution,” said study co-author Mark Norell, Macaulay Curator of Paleontology at the American Museum of Natural History. “But with the help of advanced tools like CT scanners and high-resolution microscopy, we’re making discoveries that we couldn’t have imagined 20 years ago. This work is a great example of how new technology and new ideas can be brought to old problems.”

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Because birds are living dinosaurs, scientists have long assumed that the duration of dinosaur incubation was similar to birds, whose eggs hatch within 11 to 85 days. The research team tested this theory by looking at the fossilized teeth of two extremely well-preserved ornithischian dinosaur embryos on each end of the size spectrum: Protoceratops–a pig-sized dinosaur found by Norell and colleagues in the Mongolian Gobi Desert, whose eggs were quite small at 194 grams, or a little less than half of a pound–and Hypacrosaurus, a very large duck-billed dinosaur found in Alberta, Canada, with eggs weighing more than 4 kilograms, or nearly 9 pounds. First, the researchers scanned the embryonic jaws of the two dinosaurs with computed tomography (CT) at the Museum’s Microscopy and Imaging Facility to visualize the forming dentitions. Then they used an advanced microscope to look for and analyze the pattern of “von Ebner” lines–growth lines that are present in the teeth of all animals, humans included. This study marks the first time that these growth lines have been identified in dinosaur embryos.

“These are the lines that are laid down when any animal’s teeth develops,” said lead author and Florida State University professor Gregory Erickson. “They’re kind of like tree rings, but they’re put down daily. And so we could literally count them to see how long each dinosaur had been developing.”

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Using this method, the scientists determined that the Protoceratops embryos were about three months old when they died and the Hypacrosaurus embryos were about six months old. This places non-avian dinosaur incubation more in line with that of their reptilian cousins, whose eggs typically take twice as long as bird eggs to hatch–weeks to many months. The work implies that birds likely evolved more rapid incubation rates after they branched off from the rest of the dinosaurs. The authors note that the results might be quite different if they were able to analyze a more “bird-like” dinosaur, like Velociraptor. But unfortunately, very few fossilized dinosaur embryos have been discovered.

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“A lot is known about growth in dinosaurs in their juvenile to adult years,” said co-author Darla Zelenitsky, from the University of Calgary. “Time within the egg is a crucial part of development with major biological ramifications, but is poorly understood because dinosaur embryos are rare.”

The study also has implications for dinosaur extinction. Prolonged incubation exposed non-avian dinosaur eggs and attending parents to predators, starvation, and environmental disruptions such as flooding. In addition, slower embryonic development might have put them at a disadvantage compared to other animals that survived the Cretaceous-Paleogene extinction event.

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Florida State University graduate student David Kay also is an author on this paper.

This work was funded, in part, by the U.S. National Science Foundation, grant # EAR 0959029, the Macaulay Family, and the Natural Sciences and Engineering Research Council of Canada, grant # 327513-09.

AMERICAN MUSEUM OF NATURAL HISTORY (AMNH.ORG)

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The American Museum of Natural History, founded in 1869, is one of the world’s preeminent scientific, educational, and cultural institutions. The Museum encompasses 45 permanent exhibition halls, including the Rose Center for Earth and Space and the Hayden Planetarium, as well as galleries for temporary exhibitions. It is home to the Theodore Roosevelt Memorial, New York State’s official memorial to its 33rd governor and the nation’s 26th president, and a tribute to Roosevelt’s enduring legacy of conservation. The Museum’s five active research divisions and three cross-disciplinary centers support approximately 200 scientists, whose work draws on a world-class permanent collection of more than 33 million specimens and artifacts, as well as specialized collections for frozen tissue and genomic and astrophysical data, and one of the largest natural history libraries in the world. Through its Richard Gilder Graduate School, it is the only American museum authorized to grant the Ph.D. degree and the Master of Arts in Teaching degree. Annual attendance has grown to approximately 5 million, and the Museum’s exhibitions and Space Shows can be seen in venues on five continents. The Museum’s website and collection of apps for mobile devices extend its collections, exhibitions, and educational programs to millions more beyond its walls. Visit amnh.org for more information.

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Tyrannosaurus rex

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Researchers learn more about teen-age T.Rex

Photo by Mike on Pexels.com
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Without a doubt, Tyrannosaurus rex is the most famous dinosaur in the world. The 40-foot-long predator with bone crushing teeth inside a five-foot long head are the stuff of legend. Now, a look within the bones of two mid-sized, immature T. rex allow scientists to learn about the tyrant king’s terrible teens as well.

In the early 2000s, the fossil skeletons of two comparatively small T. rex were collected from Carter County, Montana, by Burpee Museum of Natural History in Rockford, Illinois. Nicknamed “Jane” and “Petey,” the tyrannosaurs would have been slightly taller than a draft horse and twice as long.

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The team led by Holly Woodward, Ph.D., from Oklahoma State University Center for Health Sciences studied Jane and Petey to better understand T. rex life history.

The study “Growing up Tyrannosaurus rex: histology refutes pygmy ‘Nanotyrannus’ and supports ontogenetic niche partitioning in juvenile Tyrannosaurus” appears in the peer-reviewed journal Science Advances.

Co-authors include Jack Horner, presidential fellow at Chapman University; Nathan Myhrvold, founder and CEO of Intellectual Ventures; Katie Tremaine, graduate student at Montana State University; Scott Williams, paleontology lab and field specialist at Museum of the Rockies; and Lindsay Zanno, division head of paleontology at the North Carolina Museum of Natural Sciences. Supplemental histological work was conducted at the Diane Gabriel Histology Labs at Museum of the Rockies/Montana State University.

“Historically, many museums would collect the biggest, most impressive fossils of a dinosaur species for display and ignore the others,” said Woodward. “The problem is that those smaller fossils may be from younger animals. So, for a long while we’ve had large gaps in our understanding of how dinosaurs grew up, and T. rex is no exception.”

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The smaller size of Jane and Petey is what make them so incredibly important. Not only can scientists now study how the bones and proportions changed as T. rex matured, but they can also utilize paleohistology– the study of fossil bone microstructure– to learn about juvenile growth rates and ages. Woodward and her team removed thin slices from the leg bones of Jane and Petey and examined them at high magnification.

“To me, it’s always amazing to find that if you have something like a huge fossilized dinosaur bone, it’s fossilized on the microscopic level as well,” Woodward said. “And by comparing these fossilized microstructures to similar features found in modern bone, we know they provide clues to metabolism, growth rate, and age.”

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The team determined that the small T. rex were growing as fast as modern-day warm-blooded animals such as mammals and birds. Woodward and her colleagues also found that by counting the annual rings within the bone, much like counting tree rings, Jane and Petey were teenaged T.rex when they died; 13 and 15 years old, respectively.

There had been speculation that the two small skeletons weren’t T. rex at all, but a smaller pygmy relative Nanotyrannus. Study of the bones using histology led the researchers to the conclusion that the skeletons were juvenile T. rex and not a new pygmy species.

Instead, Woodward points out, because it took T. rex up to twenty years to reach adult size, the tyrant king probably underwent drastic changes as it matured. Juveniles such as Jane and Petey were fast, fleet footed, and had knife-like teeth for cutting, whereas adults were lumbering bone crushers. Not only that, but Woodward’s team discovered that growing T. rex could do a neat trick: if its food source was scarce during a particular year, it just didn’t grow as much. And if food was plentiful, it grew a lot.

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“The spacing between annual growth rings record how much an individual grows from one year to the next. The spacing between the rings within Jane, Petey, and even older individuals is inconsistent – some years the spacing is close together, and other years it’s spread apart,” said Woodward.

The research by Woodward and her team writes a new chapter in the early years of the world’s most famous dinosaur, providing evidence that it assumed the crown of tyrant king long before it reached adult size.

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About Oklahoma State University Center for Health Sciences

Oklahoma State University Center for Health Sciences educates osteopathic physicians, scientists, allied health professionals and health care administrators for Oklahoma with an emphasis on serving rural and underserved Oklahoma. OSU-CHS offers graduate and professional degrees with over 1,000 students enrolled in academic programs in the College of Osteopathic Medicine, the School of Allied Health, the School of Health Care Administration, the School of Biomedical Sciences, and the School of Forensic Sciences. OSU Medicine operates a network of clinics in the Tulsa area offering a multitude of specialty services including addiction medicine, cardiology, family medicine, internal medicine, pediatrics, psychiatry and women’s health. Learn more at https://health.okstate.edu.

Black Teens Face Racial Discrimination Multiple Times Daily

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Teens in study experience anti-black microaggressions most frequently online, according to Rutgers researcher

Black teenagers experience daily racial discrimination, most frequently online, which can lead to negative mental health effects, according to a Rutgers researcher.

The study, published in the Journal of Applied Developmental Psychology, examined how often black teens experience racial discrimination each day – either personally or vicariously and online or offline.

The researchers surveyed 101 black youth between ages 13 and 17 from predominantly black neighborhoods in Washington, D.C., each day for two weeks about their experiences with racial discrimination and measured changes in their depressive symptoms across that period. The teens reported more than 5,600 experiences of racial discrimination in total – an average of more than five experiences per day.

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“This research reflects what researchers and activists have asserted for years: Black adolescents are forced to face antiblack microaggressions on a daily basis. Importantly, this study expands the research on the many ways that discrimination happens, whether it is being teased by peers, asked to speak for their racial group in class or seeing a racist post on social media,” said lead author Devin English, an assistant professor at Rutgers School of Public Health.

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The experiences reported in the study, which ranged from teasing about physical appearance to overt discrimination, mainly occurred online and led to short-term increases in depressive symptoms. Examples of discrimination included teasing by peers about wearing their hair natural, seeing jokes about their race online and witnessing a family member or friend being treated poorly due to their race or ethnicity.

“Racial teasing is important because it is one of the most common ways adolescents communicate about race,” English noted. “Critically, young people and adults, such as teachers, often see this teasing as harmless and choose not to address it. Our results, however, show several types of racial teasing are harmful for black adolescents.”

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“Although public discourse can indirectly or directly blame health inequities on black youth, our study provides evidence that racial discrimination in society is a fundamental cause of these health inequities,” he continued. “Knowing this, people in positions of power such as clinicians, school administrators and policy makers have a responsibility to consider discrimination as a critical aspect of the daily experience and health of black teens. Racial discrimination prevention should be a public health imperative.”

Increase Social Media Likability

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Social media users who post a high percentage of selfies have lower perceived likability

Credit: iStock

A new Baylor University study published in the journal Psychology of Popular Media Culture looks at the value that outside observers place on social media cues (followers, likes, etc.) and measures the perceived likability of the people whose profiles were viewed.

WACO, Texas

Maybe you think your Facebook posts are hilarious. Or you might think that Instagram selfie of you at the beach is picture-perfect. And that clever Tweet? You nailed it! But what do other people – your “friends,” “followers” and anyone else who might stumble across your profile – think of you based on your social media presence? Do they really like you?

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A new Baylor University study published in the journal Psychology of Popular Media Culture looks at the value that outside observers place on social media cues (followers, likes, number of selfies, etc.) and measures the perceived likability of the people whose profiles were viewed. The experimental study generated 873 decision responses from 72 experienced social media users who were asked to look at differing social media profiles and posts and then assess the likeability of the social media user.

“There are many studies of individuals’ self-perception through social media use. We are turning that around and looking at the audience’s perspective,” said the study’s lead author, Steven W. Bradley, Ph.D., associate professor of entrepreneurship in Baylor University’s Hankamer School of Business.

The study shows that “perceived likability” – a combination of perceived friendliness, relevance, empathy and realness – differed among men and women. Individual cue patterns confirmed several commonly held assumptions while combinations of social cues produced more intriguing findings, Bradley said. Researchers found:

  • Social media users who amass a larger number of friends and garner high numbers of likes on their posts have a higher perceived likability
  • Social media users who are considered physically attractive have higher perceived likability
  • Social media users who post a high percentage of selfies – photos featuring only themselves – have lower perceived likability
  • Males tend to value attractiveness more than females in assessing likability
  • Females tend to base perceived likability on numbers of followers, likes and percentage of selfies
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Overall, the number of followers and likes are twice as important as attractiveness in predicting likeability, Bradley said. Alternatively, social media users with a higher percentage of selfies are considered 1.5 times less likeable by outside observers.   

Researchers found that users who were rated “low in attractiveness” gained more likability points, per se, if they had a large number of followers and likes. When social media users are viewed as “higher in attractiveness,” a change in the followers and likes from low to high increases perceived likeability by 20 percent. In contrast, for social media users who are perceived as lower in attractiveness, the difference in rated likeability between low and high followers and likes is 64 percent.

“In other words, numbers of followers and likes may be used by an observer to ‘make up’ for more obvious indicators like attractiveness when assessing likability,” the researchers wrote. “Most observers suggest that attractive people are likable due to associated attributes like social ease and confidence. A less attractive person with a high number of followers and likes suggest that other features – perhaps friendliness, relevance, empathy and realness – are the source of their social network, which also increase perceptions of likability.”

As for selfies? The researchers found that observers use their experience with cues regarding selfies to evaluate whether an authentic or manufactured self is presented.

“Too many selfies suggest the page owner is overly narcissistic and not a good friend candidate,” said study co-author James A. Roberts, Ph.D., The Ben H. Williams Professor of Marketing in Baylor’s Hankamer School of Business.

Likability diminished even when other social media status cues of followers or attractiveness were high.

“We hypothesized and found that a high percentage of selfies is a cue that may indicate less reciprocity and group benefit, focusing narcissistically on oneself relative to others,” the researchers wrote.

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ABOUT THE STUDY

The study, “Experimental Evidence of Observed Social Media Status Cues on Perceived Likability,” is published in the journal Psychology of Popular Media Culture. Authors are Steven W. Bradley, Ph.D., associate professor of entrepreneurship, Baylor University Hankamer School of Business; James A. Roberts, Ph.D., The Ben H. Williams Professor of Marketing, Baylor University Hankamer School of Business; and Preston W. Bradley, student, Live Oak Classical School, Waco, Texas.

ABOUT BAYLOR UNIVERSITY Baylor University is a private Christian University and a nationally ranked research institution. The University provides a vibrant campus community for more than 17,000 students by blending interdisciplinary research with an international reputation for educational excellence and a faculty commitment to teaching and scholarship. Chartered in 1845 by the Republic of Texas through the efforts of Baptist pioneers, Baylor is the oldest continually operating University in Texas. Located in Waco, Baylor welcomes students from all 50 states and more than 80 countries to study a broad range of degrees among its 12 nationally recognized academic divisions.

ABOUT HANKAMER SCHOOL OF BUSINESS

Baylor University’s Hankamer School of Business provides a rigorous academic experience, consisting of classroom and hands-on learning, guided by Christian commitment and a global perspective. Recognized nationally for several programs, including Entrepreneurship and Accounting, the school offers 24 undergraduate and 13 graduate areas of study. Visit http://www.baylor.edu/businessand follow on Twitter at twitter.com/Baylor_Business.

A vast majority of Floridians support stricter gun laws

Credit: Florida Atlantic University
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Bill Nelson Edges Ahead of Rick Scott in U.S. Senate Race

In the wake of a mass shooting that took the lives of 17 students and teachers at a South Florida high school, a vast majority of Floridians support stricter gun laws, including a ban on assault-style rifles, universal background checks and raising the minimum age for gun purchasers, according to a statewide survey by the Florida Atlantic University Business and Economics Polling Initiative (FAU BEPI).

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On the political front, Florida Gov. Rick Scott has lost ground to Sen. Bill Nelson in a U.S. Senate race hypothetical matchup. Although Scott has not officially declared his candidacy for the seat currently held by Nelson, the latest poll shows Nelson with a two-point lead over Scott, 40 to 38 percent. A poll FAU BEPI conducted at the beginning of February showed Scott leading Nelson by 10 points.

“The bad news for Scott is his A+ rating from the National Rifle Association (NRA) makes 44 percent of voters less likely to vote for him and only 26 percent more likely,” said Monica Escaleras, Ph.D., director of the BEPI. “A deeper dive into these numbers also finds Independents less likely to vote for Scott, 43 to 17 percent, because of his NRA rating.”

Additionally, Floridians disapprove of U.S. President Donald Trump’s response to the recent mass shooting 49 to 34 percent. Republicans approve 62 to 20 percent, while Democrats disapprove 73 to 16 percent, and Independents disapprove 53 to 23 percent.

Seven out of 10 voters want stricter gun laws while only 11 percent said laws should be less strict and 19 percent said laws should be left as is. A majority of voters of every party affiliation want stricter gun laws, with Democrats most in support at 84 percent, followed by Independents at 69 percent and Republicans at 55 percent.

Universal background checks for all gun buyers are supported by 87 percent of voters, and there is no statistical difference based on party affiliation. Nearly 4 of 5 voters (78 percent) support raising the minimum age to purchase a gun from 18 to 21, while 69 percent support a ban on assault-style rifles, with 23 percent opposed. A proposal to arm teachers is opposed by 56 percent of voters and supported by only 31 percent, with Democrats opposing by a 74 to 16 percent margin, Independents opposing 57 to 26 percent and Republicans supporting the proposal 53 to 37 percent.

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“Gun control may turn out to be a pivotal issue in the midterm elections and could well be the difference in a close race for the Senate between Rick Scott and Bill Nelson,” said Kevin Wagner, Ph.D., professor of political science at FAU and a research fellow of the Initiative. “While large majorities of Floridians support background checks and an increase in the age requirement, it is not at all clear that there is sufficient support for these measures in the Florida legislature. As we are already late in the session, it will take a serious push by Gov. Scott to pass any of these reforms this year.”

The survey also found that 27 percent of voters have either been a victim of gun violence themselves or know someone who has. Among African American voters this number jumps to 51 percent, while only 22 percent of whites and 24 percent of Hispanics have had this experience. Younger voters are also more likely to have been a victim or know a victim of gun violence, with 36 percent of voter’s age 18-34, 30 percent of age 35-54, 23 percent of age 55-74 and 9 percent of those over 75.

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When asked what they believe is the major contributor to mass shootings, the availability of guns came in first with nearly 4 of 10 voters (39 percent), while 24 percent selected a lack of mental healthcare. Violent themes on TV and video games came in third at 18 percent, while 14 percent said it’s something else. One-third of Republicans (33 percent) said the lack of mental healthcare was a major contributor of gun violence, while availability of guns was ranked as the major contributor by Democrats (56 percent) and Independents (42 percent).

More than 4 of 10 (41 percent) of voters in the survey own a gun. Republicans (52 percent) are more likely to own a gun than Democrats (36 percent) and Independents (33 percent).

“Independent voters are closer to the Democrats than the Republicans on some of these gun control issues in our poll. That could be a problem for Republicans in the fall,” Wagner said.

The survey, which polled 800 Florida registered voters Feb. 23-25, was conducted using an online sample supplied by Survey Sampling International using online questionnaires and via an automated telephone platform (IVR) using registered voter lists supplied by Aristotle, Inc. The survey has a margin of error of +/- 3.6 percentage points. Responses for the entire sample were weighted to reflect the statewide distribution of the Florida population. The polling results and full cross-tabulations are available at www.business.fau.edu/bepi.

– FAU –

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About FAU BEPI: The Florida Atlantic University Business and Economic Polling Initiative conducts surveys on business, economic, political and social issues with a focus on Hispanic attitudes and opinions at regional, state and national levels via planned monthly national surveys. The initiative subscribes to the American Association of Public Opinion Research and is a resource for public and private organizations, academic research and media outlets. In addition, the initiative is designed to contribute to the educational mission of the University by providing students with valuable opportunities to enhance their educational experience by designing and carrying out public opinion research.

About Florida Atlantic University Florida Atlantic University, established in 1961, officially opened its doors in 1964 as the fifth public university in Florida. Today, the University, with an annual economic impact of $6.3 billion, serves more than 30,000 undergraduate and graduate students at sites throughout its six-county service region in southeast Florida. FAU’s world-class teaching and research faculty serves students through 10 colleges: the Dorothy F. Schmidt College of Arts and Letters, the College of Business, the College for Design and Social Inquiry, the College of Education, the College of Engineering and Computer Science, the Graduate College, the Harriet L. Wilkes Honors College, the Charles E. Schmidt College of Medicine, the Christine E. Lynn College of Nursing and the Charles E. Schmidt College of Science. FAU is ranked as a High Research Activity institution by the Carnegie Foundation for the Advancement of Teaching. The University is placing special focus on the rapid development of critical areas that form the basis of its strategic plan: Healthy aging, biotech, coastal and marine issues, neuroscience, regenerative medicine, informatics, lifespan and the environment. These areas provide opportunities for faculty and students to build upon FAU’s existing strengths in research and scholarship. For more information, visit www.fau.edu.

Bullying children with autism

Photo by Quin Stevenson

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BINGHAMTON, NY – Children with autism spectrum disorder (ASD) are more likely to experience bullying than children without ASD and this bullying gets worse with age, according to new research from Binghamton University, State University of New York.

Hannah Morton, a graduate student in the clinical psychology PhD program at Binghamton University, aimed to conceptualize bullying in children with ASD in order to specifically identify different bullying and behavior types. Her research also emphasizes the need to establish better definitions of bullying behaviors.

“This research is important because it contributes to our understanding of how bullying is nuanced,” said Morton. “This variability means it is crucial to establish a definition for bullying and have standard assessments to know when and what types of bullying are occurring.”

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Morton, along with Binghamton psychologists Jennifer Gillis, Richard Mattson and Raymond Romanczyk, focused this study on teachers and parents of children with ASD, and community members without an ASD child. Participants took a survey containing 80 scenarios of interactions between two school-aged children. The scenarios varied from children ages four to fifteen. Sixty-four of these scenarios contained a type of bullying behavior (i.e. physical, verbal, interpersonal and cyber). The participants were randomly presented with 16 scenarios, and were asked to rate the severity of the interaction between the two children, as well as indicate which types of bullying were present.

Results showed that a child’s increased age predicted higher bullying severity ratings. The findings also showed that bullying among older children with ASD is viewed as especially problematic by their parents, and that perceived bullying severity differed according to the type of bullying behavior (i.e., physical, verbal, interpersonal, and cyber). 

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“This paper emphasizes that bullying is a really broad construct,” said Morton. “What any two people might be referring to when they use the term ‘bullying’—regardless if they are parents, teachers, researchers, etc.— likely differs, and perhaps in subtle ways.”

Morton plans to further her research on this topic by focusing specifically on the bullying behaviors that children with ASD experience compared to children without ASD.

This research was conducted through Binghamton University’s Institute for Child Development, which offers early intervention services, speech services and more to children and families in the Binghamton region. 

The paper, “Conceptualizing bullying in children with autism spectrum disorder: Using a mixed model to differentiate behavior types and identify predictors,” was published in Autism.

Meet Siamraptor suwati

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Meet Siamraptor suwati, a new species of giant predatory dinosaur from Thailand
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Fossils discovered in Thailand represent a new genus and species of predatory dinosaur, according to a study released October 9, 2019 in the open-access journal PLOS ONE by Duangsuda Chokchaloemwong of Nakhon Ratchasima Rajabhat University, Thailand and colleagues. 

Carcharodontosaurs were a widespread and successful group of large predatory dinosaurs during the Jurassic and Cretaceous Periods and were important members of ecosystems on multiple continents. However, the fossil record of these animals is notably lacking from the Early Cretaceous of Asia, with no definite carcharodontosaurs known from Southeast Asia.

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In this study, Chokchaloemwong and colleagues describe fossil material from the Khok Kruat geologic formation in Khorat, Thailand, dating to the Early Cretaceous. These fossils include remains of the skull, backbone, limbs, and hips of at least four individual dinosaurs, and morphological comparison with known species led the authors to identify these remains as belonging to a previously unknown genus and species of carcharodontosaur which they named Siamraptor suwati

Phylogenetic analysis indicates that Siamraptor is a basal member of the carcharodontosaurs, meaning it represents a very early evolutionary split from the rest of the group. It is also the first definitive carcharodontosaur known from Southeast Asia, and combined with similarly-aged finds from Europe and Africa, it reveals that this group of dinosaurs had already spread to three continents by the Early Cretaceous.

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The authors summarize their work as follows: “A Siam predator: New carnivorous dinosaur Siamraptor suwati discovered in Thailand.

Image Caption: Siamraptor skull reconstruction

Image Credit: Chokchaloemwong et al., 2019

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Citation: Chokchaloemwong D, Hattori S, Cuesta E, Jintasakul P, Shibata M, Azuma Y (2019) A new carcharodontosaurian theropod (Dinosauria: Saurischia) from the Lower Cretaceous of Thailand. PLoS ONE 14(10): e0222489. https://doi.org/10.1371/journal.pone.0222489

Funding: This work was supported by the Fukui Prefectural Government, Japan, and Nakhon Ratchasima Rajabhat University, Thailand. EC research was financed by a Postdoctoral Fellowship program of the Japan Society of Promotion of Science (JSPS) (Ref. PE18034). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Competing Interests: The authors have declared that no competing interests exist.

A super tool helps kids with autism improve socialization skills

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A team of NIH-funded researchers at Stanford University Medical School has found that children with autism improved measurably on a test of socialization and learning when their therapy included an at-home intervention with Google Glass. Google Glass is a headset worn like eyeglasses that provides augmented reality on a miniature screen, with sound. The smart system of eye wear and mobile-phone-based games helped the children with autism understand emotions conveyed in facial expressions.

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Autism is a complex neurological and developmental spectrum disorder that affects how children interact with others, communicate, and learn. Many children affected by autism spectrum disorder (ASD) are unable to discern facial expressions, so miss out on important cues that aid in learning and socialization.

The Stanford team, led by Dennis P. Wall, Ph.D., associate professor of Pediatrics, Psychiatry and Biomedical Data Sciences, used Google Glass’s built-in camera along with software customized to run on a smart phone as an intervention that care givers used with their children at home to supplement clinic-based therapy.  The study was published March 25, 2019, in JAMA Pediatrics.

“Technology can be a terrific asset to the therapy process, for both physical and neurodevelopmental gains,” said Tiffani Lash, Ph.D., director of the NIBIB programs in Connected Health (mHealth and Telehealth), and Point-of-Care Technologies. “This is a heartwarming achievement and a promising example using a bioengineering approach. The innovative software and hardware solution coupled with the therapeutic component meets a dire need for many children and their parents.”

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Google Glass is lens-less, non-invasive, and peripheral—sitting off to the right side of view for the child. “The system acts as a true augmentation to their reality, keeping them in their natural social world, as opposed to taking them out of it,” Wall said. “In contrast to virtual or mixed reality, augmented reality is potentially a powerful vehicle through which we can teach children social skills to rescue some of these deficits early in their development.”

A camera in the device captures the facial expression of family members in the glasses’ field of view, reinforcing what the child sees by providing an image and audio prompt. It detects up to eight emotions: happy, sad, angry, scared, surprised, disgusted, “meh,” and neutral. The glasses are wirelessly connected to a smartphone device that may be operated in three different play modes. There is ‘find the smile’ game, where the child is prompted to say something that prompts an expression in the family member’s face; the ‘guess the emotion’ game, where the family member asks the child to guess the emotion from the family member’s face; and free play, an unstructured mode of identifying facial expressions.

The device also records a video that parents can observe at a later time to monitor the progress that their child makes with the activities. “Our hope was that the video playback would be a good source of reinforcement learning with the children,” Wall said. “It provides the opportunity for the learner to focus in on certain human emotions that they may or may not be getting right, so they might become more adept at detecting those emotions in real time.”

The researchers recruited 71 children between the ages of six and 12 who all had been enrolled in a program of applied behavioral analysis therapy—the standard care for most children with ASD. Experts recommend 20 hours per week of the standard therapy, in which the child interacts with a therapist who leads learning activities to improve social, motor, and verbal behaviors, as well as reasoning skills through observation and positive reinforcement. The authors cite the current cost for this standard therapy to be between $40,000 and $60,000 per year, noting that parents can often wait up to 18 months for their child to gain access to the therapy.

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Experts suggest that it is important for children with ASD to receive a diagnosis early—which can be assessed by the age of two—so that children can begin treatment as early as possible. According to the authors, learning aids such as the type tested in the study could begin to address this difficult challenge of accessing therapy more immediately, outside the clinic.

Of the 71 enrolled in the study, 40 children also received the augmented reality device to play the programmed games or freely play during 20-minutes sessions, four times per week. After six weeks, the team assessed all 71 children on a standard socialization scale.

The researchers found that children receiving the smart-glasses intervention along with standard therapy scored significantly better in the post-study assessment than those in the control group. Children who used the smart glasses improved 4.58 points on the standard scale above those who did not use the Google Glass intervention. Authors unrelated to the work by Wall and colleagues recently published in Autism Research that changes of 2 to 3.75 points on the scale represent a clinically important difference.

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“This is based on a statistically rigorous approach to the analysis of the data,” Wall said. “We should be excited about the result. While the overall effect is modest, the positive change seen in the treated children is significant and points to a new direction that could help more children get the care they need, when they need it.”

Wall noted that the device represents a short-term learning aid and predicts that in the not-too-distant-future there will be a wider array of available augmented reality wearables. “After a period of time, they take the glasses off and they grow on their own into more complex social scenarios.”

Though a playful intervention, families in the treatment group missed a portion of the prescribed hours in which to practice with Google Glass, and most preferred the structured games over the unstructured free-play option. But the activity was positively received to the point that children who participated in the study created a new name for the tool, calling it Superpower Glass, a moniker the authors adopted in writing their report on the study. The researchers have begun to plan for a larger, follow up study.

For more about autism spectrum disorder, go to: https://www.nimh.nih.gov/health/topics/autism-spectrum-disorders-asd/in…

The research was conducted with support from NIBIB (EB025025) and the Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD091500), both at NIH.

The study: Effect of Wearable Digital Intervention for Improving Socialization in Children With Autism Spectrum Disorder: A Randomized Clinical Trial. Voss C, Schwartz J, Daniels J, Kline A, Haber N, Washington P, Tariq Q, Robinson TN, Desai M, Phillips JM, Feinstein C, Winograd T, Wall DP. JAMA Pediatrics. 2019 Mar 25

Yoga and Autism

Free online yoga

Motor development would be the first phase that comes to mind when we talk about yoga and autism, but this is only one of the many facets of yoga. Breath control, useful for stabilizing emotions, mastering one’s body and therefore greater manual skills.

Yoga practice allows children to develop stability, balance and motor skills. Some asanas require children to learn to balance their weight well between their legs and arms, to try to keep their balance on one foot or to keep their head and spine aligned, always respecting their age and their abilities physical.

Free online yoga

Yoga can improve sensory integration skills so that it is useful to train stimuli or stimuli in children with autism. Sensory integration itself is the brain’s ability to read and translate various stimuli from the five senses, namely vision, smell, touch, hearing and taste.

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In children with autism, altered sensory integration causes children to have difficulty interpreting the sensory stimuli they receive. Through yoga positions, children will learn to recognize and interpret various types of sensory stimuli.

Jurassic fossil

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Discovery of a new fossil in China sheds light on when early mammal ancestors first evolved sophisticated thyroid bones that gave them the ability to swallow food like modern-day mammals.

The 165-million-year-old fossil of Microdocodongracilis, a tiny, shrew-like animal, shows the earliest example of modern hyoid bones in mammal evolution The hyoid bones link the back of the mouth, or pharynx, to the openings of the esophagus and the larynx. The hyoids of modern mammals, including humans, are arranged in a “U” shape, similar to the saddle seat of children’s swing, suspended by jointed segments from the skull. It helps us transport and swallow chewed food and liquid – a crucial function on which our livelihood depends.

Mammals as a whole are far more sophisticated than other living vertebrates in chewing up food and swallowing itone small lump at a time, instead of gulping down huge bites or whole prey like an alligator.

“Mammals have become so diverse today through the evolution of diverse ways to chew their food, weather it is insects, worms, meat, or plants. But no matter how differently mammals can chew, they all have to swallow in the same way,” said Zhe-Xi Luo, PhD, a professor of organismal biology and anatomy at the University of Chicago and the senior author of a new study of the fossil, published this week in Science.

“Essentially, the specialized way for mammals to chew and then swallow is all made possible by the agile hyoid bones at the back of the throat,” Luo said.

‘A pristine, beautiful fossil’

This modern hyoid apparatus is mobile and allows the throat muscles to control the intricate functions to transport and swallow chewed food or drink fluids. Other vertebrates also have hyoid bones, but their hyoids are simple and rod-like, without mobile joints between segments. They can only swallow food whole or in large chunks.

When and how this unique hyoid structure first appeared in mammals, however, has long been in question among paleontologists. In 2014, Chang-Fu Zhou, PhD, from the Paleontological Museum of Liaoning in China, the lead author of the new study, found a new fossil of Microdocodon preserved with delicate hyoid bones in the famous Jurassic Daohugou site of northeastern China.Soon afterwards, Luo and Thomas Martin from the University of Bonn, Germany, met up with Zhou in China to study the fossil.

“It is a pristine, beautiful fossil. I was amazed by the exquisite preservation of this tiny fossil at the first sight. We got a sense that it was unusual, but we were puzzled about what was unusual about it,”Luo said. “After taking detailed photographs and examining the fossil under a microscope, it dawned on us that this Jurassic animal has tiny hyoid bones much like those of modern mammals.”

This new insight gave Luo and his colleagues added context on how to study the new fossil. Microdocodonis a docodont, from an extinct lineage of near relatives of mammals from the Mesozoic Era called mammaliaforms. Previously, paleontologists anticipated that hyoids like this had to be there in all of these early mammals, but it was difficult to identify the delicate bones.  After finding them in Microdocodon, Luo and his collaborators have since found similar fossilized hyoid structures in other Mesozoic mammals.

“Now we are able for the first time to address how the crucial function for swallowing evolved among early mammals from the fossil record,” Luo said. “The tiny hyoids of Microdocodonare a big milestone for interpreting the evolution of mammalian feeding function.”

New insights on mammal evolution as a whole

Luo also worked with postdoctoral scholar Bhart-Anjan Bhullar, PhD, now on the faculty at Yale University, and April Neander, a scientific artist and expert on CT visualization of fossils at UChicago, to study casts of Microdocodonand reconstruct how it lived.

The jaw and middle ear of modern mammals are developed from (or around) the first pharyngeal arch, structures in a vertebrate embryo that develop into other recognizable bones and tissues. Meanwhile, the hyoids are developed separately from the second and the third pharyngeal arches. Microdocodonhas a primitive middle ear still attached to the jaw like that of other early mammals like cynodonts, which is unlike the ear of modern mammals. Yet its hyoids are already like those of modern mammals.

“Hyoids and ear bones are all derivatives of the primordial vertebrate mouth and gill skeleton, with which our earliest fishlike ancestors fed and respired,” Bhullar said. “The jointed, mobile hyoid of Microdocodoncoexists with an archaic middle ear — still attached to the lower jaw. Therefore, the building of the modern mammal entailed serial repurposing of a truly ancient system.”

The tiny, shrew-like creature likely weighed only 5 to 9 grams, with a slender body, and an exceptionally long tail. The dimensions of its limb bonesmatch up with those of modern tree-dwellers.

“Its limb bones are as thin as matchsticks, and yet this tiny Mesozoic mammal still lived an active life in trees,” Neander said.

The fossil beds that yielded Microdocodonare dated 164 to 166 million years old. Microdocodonco-existed with other docodonts like the semiaquatic Castorocauda, the subterranean Docofossor, the tree-dwellingAgilodocodon, as well as some mammaliaform gliders.

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The study, “New Jurassic mammaliaform sheds light on early evolution of mammal-like hyoid bones,” was published in Scienceon July 19, 2019. The research was supported by the University of Chicago Division of Biological Sciences (Luo); the Deutsche Forschungsgemeinschaft (Martin); and the National Natural Science Foundation and Ministry of Land Resources of China, Shenyang Normal University, and Shandong University of Science and Technology (Zhou).