At the top of Yosemite National Park's Vernal Fall on a recent holiday weekend, amid the throngs of tourists snapping photos and feasting on snacks and picnic lunches, a squirrel ...

A new study suggests a meteor strike that created Arizona’s Meteor Crater 56,000 years ago may have triggered a massive landslide in the Grand Canyon, blocking the Colorado River and forming a 50-mile ...

Scientists find a link between Barringer Crater and Grand Canyon landslide. Research indicates both events occurred around 56 ...