Residents in Northern Colorado may spot a low flying helicopter in the area over the next three months due to an ongoing ...

The United States Geological Survey has started flying helicopters between 100 to 200 feet above the ground with a giant ...

Wildlife managers, scientists and conservationists have a more complete ecological map of the American West with the release ...

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...

A fountain of lava was spewing from a Hawaii volcano Tuesday in the latest episode of an eruption that has paused and resumed ...