Huge Mars Lakes Formed Much More Recently Than Thought

Some Red Planet streams and lakes — including one bigger than several of North America's Great Lakes — formed just 2 billion to 3 billion years ago, a new study suggests. "This paper presents evidence for episodes of water modifying the surface on early Mars for possibly several hundred million years later than previously thought, with some implication that the water was emplaced by snow, not rain," Mars Reconnaissance Orbiter (MRO) project scientist Rich Zurek, of NASA's Jet Propuls