There are few more potent reminders that Mars used to be a wet world than seeing ancient, dried up river beds etched into the red planet’s surface.
from SPACE.com http://ift.tt/1Zmt7t9
via IFTTT
There are few more potent reminders that Mars used to be a wet world than seeing ancient, dried up river beds etched into the red planet’s surface.
from SPACE.com http://ift.tt/1Zmt7t9
via IFTTT