Why Are Craters on Saturn's Moons Vanishing?

TECH SPACE HUMAN EARTH HISTORY ANIMALS ADVENTURE VIDEO View Online Why Are Craters on Saturn's Moons Vanishing? Something is erasing craters on several moons of Saturn. What are the most likely causes? READ MORE Cancer-Free Elephants May Hold Key to Cure Nature has figured out how to prevent cancer in elephants, and now new research is revealing their disease-fighting strategies could also work in people. READ MORE WATCH VIDEO: Some Poachers Become Elephant Protectors In Zimbabwe, the move from poacher to protector is a financial one. Our Universe Is the 'Simplest' Thing We Know It's just our cosmological theories that are getting needlessly complex, argues one of the world'stop theoretical physicists. READ MORE WATCH VIDEO: How Fast Are We All Hurtling Through the Universe? There's nothing in the universe that isn't moving -- even us. Why People Pull Their Hair Out As with many mental health issues, the syndrome is caused by a complicated mix of psychology, biology and the environment. 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