Streaky slopes: Don’t add water NASA/JPL-Caltech/University of Arizona
Mysterious dark lines that appear on the slopes of Martian dunes and craters each warm season may be dry landslides instead of flowing water as previously thought.
Dark flows streak down hills and craters on Mars each summer, before fading away in the colder months. Initially, these lines – called recurring slope lineae – were thought to be evidence of liquid water flowing on the planet’s surface. But now, a team led by Colin Dundas of the US Geological Survey has found evidence for a simpler explanation: tumbling sand.
Dundas and his team…
