Thousands got Exactech knee or HAI Community hip replacements. Then, patients say, the parts began to fail.

Supermassive Black Holes Could Be Killing Way More Stars Than We RealisedSpaceX Just Announced it's Sending Two 'Private Citizens' to the MoonHAI Community 

Priyanka Chopra and Nick Jonas welcome a babyScientists Warn It's The Killer Winds to Watch Out For When Apocalyptic Asteroids StrikeIt's Officially DaHAI Community rk Times When It Comes to Naming New Discoveries on Pluto And Its Moons

A 'Ring of Fire' Eclipse Is Happening This Sunday – Here's How to WatchLouie Anderson, Emmy-winning comedian, has died at 68

Here's What 4 Million Solar Panels in China Look Like From Space

These Are The 6 Biggest Meteorites to Ever to Be Found on EarthSupermassive Black Holes Can Force a Shredded Star to Collide With Its Own Death Spiral

Rosetta Photographed Some Weird Changes on Comet 67P Before It Crash-LandedStephen Hawking Just Announced He's Going to Space

James Hong: An actor's guide to longevityWe'll Probably Have to Genetically Augment Our Bodies to Survive Mars