Our Galaxy Could Be Mixing With Andromeda's Halo

TECH SPACE HUMAN EARTH HISTORY ANIMALS ADVENTURE VIDEO View Online Our Galaxy Could Be Mixing With Andromeda's Halo Just as Yosemite's Dawn Wall had once been considered too difficult to free-climb, the future of the sport lies in what today seems unfathomable. READ MORE Vets and Others With PTSD Age Faster PTSD, a psychological disorder, is linked for the first time with long-term, systemic effects on a basic process such as aging. READ MORE WATCH VIDEO: Therapeutic War Game Helps Iraq Vets A virtual reality game, called 'Virtual Iraq,' is helping soldiers deal with mental scars. 11 Amazing Animal Appendages Meet the creatures with (we think) the most amazing things attached to their bodies. READ MORE WATCH VIDEO: 5 Craziest Sperm in the Animal Kingdom The oldest sperm on record made us wonder about other animal sperm, too. Why Don't We Burn Our Trash? Sweden is able to recycle 99 percent of their trash, some of which they burn for power. Why isn't this practiced in the United States? 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