Why Didn't the FBI Stop the Orlando Shooter?

TECH SPACE HUMAN WORLD HISTORY ANIMALS EXPLORATION VIDEO View Online Why Didn't the FBI Stop the Orlando Shooter? The killer had been on a watch list, but not enough evidence was found for arrest. READ MORE New Mating Position for Frogs Discovered Bombay night frogs mate using a position never before seen in frogs -- the dorsal straddle -- but there's a catch. READ MORE WATCH VIDEO: Which Animals Have Sex for Fun? There sure is a lot to learn about sex in the animal kingdom! Starry, Starry Night? Not For Most Of Us Light pollution obscures view of Milky Way for 80 percent of Americans and one-third of the world's population, a new study shows. READ MORE WATCH VIDEO: What Can Giant Telescopes Reveal About Our Universe?  Check out these monsters (present and future) of the astronomy world. Meet the Third Party Candidates Many Americans are dissatisfied with this year's presidential nominees and are considering a third party. So what are their other options? 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