Comet Metal Rained Down on Mars

TECH SPACE HUMAN EARTH HISTORY ANIMALS ADVENTURE VIDEO View Online Comet Metal Rained Down on Mars Magnesium and iron measurements suggest the meteor shower rate on Mars must have been tens of thousands of shooting stars per hour -- for hours. READ MORE Bizarre Night-Shining Clouds Form High in Atmosphere These mysterious electric blue wisps, which form on the edge of space, could be a sign of climate change. READ MORE WATCH VIDEO: What Are Night Shining Clouds? Kasey-Dee Gardner talks to a cloud investigator to find out why we sometimes see clouds at night. Badass Worm Gave Rise to Insects, Spiders, Shellfish The prehistoric animal is so bizarre that, for years, scientists couldn't figure out which side of it was the front and which was the back. READ MORE WATCH VIDEO: Puppy-Sized Spider and 6 Other Freaky Arachnids See what tricks these special creatures use to keep themselves safe and fool their prey into making fatal missteps. Does It Cost More to Be a Woman? A survey found that women pay an extra $1,300 a month compared to men, due to a gender discriminatory pricing. 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