Mars' Ancient Atmosphere Wasn't So Thick After All

TECH SPACE HUMAN EARTH HISTORY ANIMALS ADVENTURE VIDEO View Online Mars' Ancient Atmosphere Wasn't So Thick After All The search for Mars' 'missing' atmospheric carbon has been called off due to the revelation. READ MORE Can New Energy Tech Save the Planet? Serious investment in green tech is crucial because the innovations set to change the world don't exist yet. READ MORE WATCH VIDEO: Why People Still Deny Climate Change As the Paris climate talks kick off, we look at why people deny the planet is warming. Knuckle Cracking 'Fireworks' Captured with Ultrasound A firework explodes out of popping joints, according to researchers who have just cracked at least some of the mystery behind knuckle cracking. READ MORE WATCH VIDEO: Does Knuckle Cracking Cause Arthritis? We pop this common myth and look at how you can actually develop arthritis. Can Tougher Corals Save Reefs From Extinction? Scientists are busy breeding a new kind of coral they hope will be able to withstand the harsher conditions predicted of future seas. 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 2015 Discovery Communications, LLC