Did Mars' Methane Come from Comets?

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TECH SPACE HUMAN EARTH HISTORY ANIMALS ADVENTURE VIDEO View Online Did Mars' Methane Come from Comets? A correlation is found between when methane plumes appear on Mars and when the planet passes through remnants of a comet. READ MORE Metallic Ink Revealed in Burned Ancient Scrolls The finding proves that metal-bearing ink was used several centuries earlier than previously believed. READ MORE WATCH VIDEO: Pompeii's Agonizing Last Moments We recount the stunning force behind the blast that wiped out an entire city 2,000 years ago. Morphing Metal Could Create Shapeshifting Robots A hybrid material of silicone foam and metal turns elastic when slightly heated up. READ MORE WATCH VIDEO: Tiny Batteries Will Revolutionize Robotics A tiny lithium-ion battery could dramatically change robotics. Ibuprofen vs. Acetaminophen: What's the Difference? You have a headache, and the only thing to make the pain subside is to turn to your medicine cabinet's offerings. But which one will do the trick? 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 2016 Discovery Communications, LLC