Several key moments in Earth's history help us humans answer the question "How did we get here?" These moments also shed ...

In 1984, an amateur paleontologist in Scotland found a remarkable specimen: a nearly complete fossil of what looked to be a ...

A new study reveals that the aerobic nitrogen cycle in the ocean may have occurred about 100 million years before oxygen began to significantly accumulate in the atmosphere, based on nitrogen isotope ...

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