Asteroid Bennu: How deadly is NASA’s killer asteroid threat heading for Earth? ASTEROID Bennu, a monstrous killer asteroid of cataclysmic proportions could one day slam into Earth, NASA’s top scientists have gravely warned. But how deadly would a collision with Bennu be? Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:R.S.V.? She Hadn’t Heard of It. Then Her Child Was HospitalizedHow Much Has ‘Climate Change’ Been Scrubbed From Federal Websites? A Lot.Dr. James Melius, Advocate for Workers’ Health, Dies at 69Out There: Magnetic Secrets of Mysterious Radio Bursts in a Faraway GalaxyDolphins Mug for Camera in Awareness TestMore Female Sea Turtles Born as Temperatures Rise