Touren Pope was rockhounding in the Greater Green River Basin when he found a remarkable foot-long fossil. It turned out to be the shell of a ...

Fossil crustaceans preserved in Japanese sediments reveal how ancient ocean currents linked Asia and North America during the ...

Researchers have discovered the oldest known example of a predator-prey “arms race,” based on their study of ancient fossils. This ancient predator-prey relationship took place 517 million years ago ...

This archived news story is available only for your personal, non-commercial use. Information in the story may be outdated or superseded by additional information. Reading or replaying the story in ...

At the end of the Paleocene and beginning of the Eocene epochs, between 59 to 51 million years ago, Earth experienced dramatic warming periods, both gradual periods stretching millions of years and ...