Remembering Challenger 30 Years On

TECH SPACE HUMAN EARTH HISTORY ANIMALS ADVENTURE VIDEO View Online Remembering Challenger 30 Years On Three decades after NASA's Space Shuttle Challenger exploded shortly after lift-off, take a look back at that terrible morning in 1986 and its powerful legacy. READ MORE No, Earth Isn't Flat – Even Ancients Knew That Scholars have known for thousands of years that Earth is round. One rapper thinks they've got it all wrong. READ MORE WATCH VIDEO: Meet Earth's Orbital Dance Partner It orbits the sun, just like us, and is locked with Earth in what's called orbital resonance. Zika Virus to Hit US Before Vaccine Pregnant women should avoid mosquitoes, say experts, since the virus will likely spread in the United States before a vaccine or treatment is found. READ MORE WATCH VIDEO: Are Viruses Alive? We examine new evidence about whether viruses are life forms. Could Dinosaurs Really Roar? If you've seen 'Jurassic Park,' then you know dinosaurs had a fierce roar. But it turns out they might not have been able to roar at all. 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