Thousands of fossils from the La Brea tar pits in California show no signs of mammals and birds evolving in response to ...

After 128 years of exploration and fossil excavation, researchers have finally unearthed the skull of Genyornis newtoni.

While there, she conducted research at the nearby La Brea Tar Pits and became familiar with ... He points out a Say’s phoebe—a smallish gray bird with a brilliant yellow belly.