Fifty thousand years ago, North America was home to towering giants. Mammoths roamed the tundra, saber-toothed cats hunted in ...

The private company Colossal Biosciences claims to have resurrected dire wolves through genetic editing. The resulting trio, ...

Published in Science Advances, the study found that many species do not stick to a single daily rhythm, contradicting decades of scientific assumptions. These findings reveal the flexibility of ...

A Texas-based genetics company says the long-extinct dire wolf is back. Some critics say that's not quite true.

Colossal Biosciences said it used ancient DNA from the extinct species to create three dire wolf pups named Romulus, Remus ...

From Mexico to the mountains, Arizona’s hummingbirds are on the move. Here's when and how to spot them in Arizona.