'Spiders' spotted on surface of Mars: Here's what they really are

An orbiter captured images of 'spiders' on Mars in Inca City. But what is it, really? The Mars orbiter images appear to suggest that the Red Planet has succumbed to an infestation of creepy crawlies, but what's really going on has to do with a carbon dioxide eruption. One look at recent images released by the European Space Agency may cause you to wonder if spiders are on the cusp of bursting forth onto the Martian surface. But arachnophobes have …