Has Curiosity Found Fossilized Life on Mars?

TECH SPACE HUMAN EARTH HISTORY ANIMALS ADVENTURE VIDEO View Online HAS CURIOSITY FOUND FOSSILIZED LIFE ON MARS? There are compelling structures in a slab of sedimentary Mars rock, but their discovery alone won't prove there was ancient life on Mars. READ MORE Atlantis' Legendary Metal Found in Shipwreck Divers find nearly 40 metal ingots from a shipwreck off the coast of Sicily that was lost in the sixth century. READ MORE WATCH VIDEO: What Does Our Oceans Reveal About Global Warming? The deep ocean has not warmed as expected -- why? Polar Bear Gene Flow Shows Move to Icier Regions The genetic structure of polar bears has changed amid a decline in sea-ice habitat. READ MORE WATCH VIDEO: Why Don't Polar Bears Migrate? Find out why polar bears brave the cold and how other species hibernate. Hug More to Strengthen Your Immune System New research suggests hugging could be a key front-line defense for our cold-, flu- and winter-battered immune systems. WATCH Follow Discovery News on Facebook! Get your sci-tech headlines all day on Twitter too! At Discovery Communications, we value your privacy. If you would like to be removed from future communications like this, please click here. Privacy Policy Discovery Communications, LLC One Discovery Place Silver Spring, MD 20910 © Copyright 2014 Discovery Communications, LLC