A new study has dated the footprints found at White Sands National Park, suggesting they could be as old as 23,000 years.

The lush, tropical regions of Central and South America have long dazzled scientists with their plant diversity. These ...

In the remote reaches of Arizona s Petrified Forest National Park, scientists have unearthed North America's oldest known pterosaur a small, gull-sized flier that once soared above Triassic ecosystems ...