Megafloods may have carved canyons on both Earth and Mars
Wednesday, December 18, 2013 - 11:56
in Astronomy & Space
Nearly 50,000 years ago, a megaflood may have washed across the area that is now Idaho, carving a gorge — a discovery that could explain similar canyons on Mars, a new study finds.Canyons are ravines typically created by rivers slicing into rock over eons.