The planet Mars is a glutton for punishment.

Scientists have found no less than 20 new craters etched into the red planet’s surface from space rocks that pummeled Mars within the last seven years [image].

“If you were to live on Mars for about 20 years, you would live close enough to one of these events to hear it,” said researchers Michael Malin, who led the study. “So there’d be a big boom and you’d know there was an impact crater.”

http://www.space.com/scienceastronomy/0612...rs_craters.html