Scientist Pete Kelsey and his team have 3D-mapped the entire island of Alcatraz, discovering Civil War secrets, prisoner escape routes – and looking at ways to preserve the island for the future.

Donut Falls, located near Salt Lake City, Utah, is the perfect hike for families or anyone looking for an easy, fun outdoor ...

Researchers have proposed many origins for a gravity anomaly in Wilkes Land, East Antarctica, but the latest evidence ...