Spectacular Space Station Spacewalks: Photos

TECH SPACE HUMAN WORLD HISTORY ANIMALS EXPLORATION VIDEO View Online Spectacular Space Station Spacewalks: Photos Spacewalks are one of the riskiest -- but more amazing -- things you can do during a spaceflight. READ MORE Man With Scissors Assists Shark Birth: Video Snip, snip, snip and out popped a bamboo shark. READ MORE WATCH VIDEO: 4 Freshwater Animals More Terrifying Than Sharks These freshwater animals are way more dangerous. The Year's Best Drone Videos in Three Minutes Flat A montage from a drone film festival showcases the artistic potential of UAV camera systems. READ MORE WATCH VIDEO: The Rise of the Drone Will soldiers soon be replaced by machines? What Is 4-Strand DNA and Why Are Scientists So Excited? We've all learned that DNA is a double helix, but it's more complex than that. What other configurations can DNA have? 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