7 Close Encounters with Comets: Photos

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7 Close Encounters With Comets: Photos         With the arrival of the Rosetta spacecraft to a comet, we look back at past close-comet encounters. Read More WATCH VIDEO: Could We Lasso an Asteroid? Large asteroids are filled with precious metals that some hope to actually mine and bring back to Earth. How to Trick the Ebola Virus         Many potential drug cures remain in the laboratory -- and one treatment won't fit all. Read More WATCH VIDEO: Could Ebola Become the Next Global Pandemic? What are the chances of the illness going terrifyingly global? Shark Body Parts and Their Dollar Values         From head to tail, price tags have been placed on shark body parts and those of closely related rays. Read More WATCH VIDEO: Shark Attack! Tips to Fight Back Learn a few insider tips on what to do in the event of a shark attack. Luxury Dog Food: A Brief History of Canine Cuisine         When did we stop feeding dogs people food, and is the tide turning back? Watch Follow Discovery News on Facebook! Get your sci-tech headlines all day on Twitter too! Follow us @Discovery_News. At Discovery we value your privacy. If you would like to be removed from Discovery News emails like this, please click here to our subscription center, where you can manage your account. We recently updated our privacy policy. This policy is effective as of 10/30/07. To see new policy click here . Discovery Communications, LLC One Discovery Place Silver Spring, MD 20910 © 2014 Discovery Communications, LLC