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 ...

Spriggina floundersi was no bigger than a few centimeters, lived on ancient seafloors in what is now South Australia, and ...

Research on Spriggina floundersi fossils found the wormlike creatures favored their right sides, a behavioral preference in ...

More than 500 million years ago, during what is known as the Cambrian period, the seas and oceans on Earth were filled with a myriad of marine animals, many of which have now become extinct. This ...

The birds of today descended from the dinosaurs of yore. Researchers have known relatively little, however, about how the bird's brain took shape over tens of millions of years. "Birds are one of the ...

A study of fossil teeth from China shows early mammals got bigger before their diets became specialized after the ...

These long-extinct, fearsome creatures are turning up in living rooms and corporate offices as wealthy collectors indulge a ...

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 ...