death, the dinosaur was only three years old and measured just 21 inches (57 centimeters) in length. With its sharp, curved teeth and specialized claws, it was clearly a tactical hunter. According to Scott Hartman, a vertebrate paleontologist at the...

ecosystem, it provides a crucial, verifiable data point in a landscape where such evidence is historically scarce. Mastodon teeth featured prominent cone-shaped ridges that were well suited to chewing leaves, bark and woody plants. Credit: CM...

animal’s biology. The skull lacks the features associated with early reptiles, instead displaying a mouth packed with tiny teeth designed for aquatic prey. Most significant are the clear traces of internal gills, indicating the creature was fully...

strategies of these ancient creatures before their extinction 66 million years ago. Close-up of fossilized dinosaur embryo teeth, showing their preserved structure. Credit: BMC Ecology and Evolution As cataloged research continues to expand—with over...

disparity previously claimed. It is entirely possible that both sexes possessed the characteristic horns and saber-like teeth, a trait that would have significant implications for how we understand their social behaviors and evolutionary adaptations....

Scientists have discovered that the high-pitched part of a horse’s whinny is not made by vibrating vocal folds, but by a whistle inside the larynx, revealing an unexpected source of vocal complexity in one of the world’s largest land mammals. There is...