The Martian moon Phobos is covered in weird grooves. A new idea is that boulders blasted out from an impact caused them to roll over the moon, carving the grooves.
Then and Now: Our Earliest Close-Ups of the Planets Compared to Today s Best Shots gizmodo.com.au - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from gizmodo.com.au Daily Mail and Mail on Sunday newspapers.
A New Map Shows Where Mars is Hiding all its Ice universetoday.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from universetoday.com Daily Mail and Mail on Sunday newspapers.