For decades, paleontologists have held up uintatheres as a prime illustration of sexual dimorphism, or the tendency for males ...

For the more than 242 million years that lizards and snakes appear in the fossil record, they show up mostly as pieces of lizard jaws and snake vertebrae. Exactly why these parts survive as fossils ...

More than a million years ago, on a hot savanna teeming with wildlife near the shore of what would someday become Lake Turkana in Kenya, two completely different species of hominins may have passed ...

This article predates the current owners of Science Blog. It has not been reviewed under the current editorial process and is kept as part of the archive. A new study from researchers at Utrecht ...

The oldest fossilized remains of complex animals appear suddenly in the fossil record, and as if from nowhere, in rocks that are 538 million years old. Subscribe to our newsletter for the latest ...

"We analysed the fossil record and found that the quality of the record of four groups of dinosaur (clades) gets worse during the final 6 million years prior to the asteroid. The probability of ...

The global fossil record of squamates, which includes lizards, mosasaurs, snakes, and amphisbaenians (A) is overwhelmingly incomplete, with most fossil species containing less than 20% of the totality ...

A 3D computerized model of the surface of the area near Lake Turkana in Kenya shows fossil footprints of Paranthropus boisei (vertical footprints) with separate footprints of Homo erectus forming a ...