This article will include dinosaur fossils. After all, the extinct reptile group hardly fails when gripping attention, whether through the discovery of a new species or simply a new behavior.
- indicates that the two belong to the same taxon and help confirm that the Tam Ngu Hao 2 specimen is Denisovan.The T-rex as a large carnivorous species developed smaller eye orbitalsYou’d think having tiny arms was enough for a T-rex regarding evolution’s questionable choice for stability. However, according toin Nature, the famously ferocious predator also traded in smaller eyes for a more forceful bite.
To the researcher’s surprise, the study, which included both adult and juvenile examples, revealed that the juvenile individuals always had a circular eye socket, even if the adult T-rex had keyhole-shaped eye sockets. This result suggests that high bite forces were not a priority for the juvenile, and by inference, they likely had a different diet and hunting strategy compared to a fully grown T. rex.
Araújo and his colleagues first examined the inner ears of hundreds of modern animals. They found that the inner ear canals in mammals were more circular, smaller, and thinner relative to their body size compared to those in cold-blooded reptiles, amphibians, and fish. The results indicated that mammal ancestors first became warm-blooded over a roughly 1-million-year period during the late Triassic. This time frame also corresponds with the first known appearance of mammaliamorphs, mammalian ancestors that also had hairs and whiskers.Holes found in the iconic frill of the three-horned extinct reptile known as Triceratops have caused much debate in the paleontology community.
“We propose that the panda’s “thumb” performs a dual function of grasping bamboos and weight bearing. These two functions counterbalance each other, i.e., the weight-bearing function has apparently prevented the pandas from ever developing a full-fledged digit,” shares lead author Dr. Xiaoming Wang, curator and chairman at the department of Vertebrate Paleontology at the Natural History Museum of Los Angeles.
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