Researchers discovered a 520-million-year-old fossil of an arthropod named Youti yuanshi that still had its brain and guts ...

Spiders are not well represented in the fossil record. Their soft external skeletons don't typically preserve well -- except at a few exceptional sites around the world. There is one remarkable spot ...

During the course of evolution, the mammalian cranio-mandibular secondary joint—formed by the dentary condyle and the ...

In a world that looked nothing like today’s, long before the rise of the dinosaurs or even the first trees, giant living towers stretched skyward from the Earth’s surface. Some reached heights of 26 ...

A newly discovered fossil in Mongolia’s Gobi Desert has revealed the oldest and most complete pachycephalosaur ever found, ...