Asteroid warning: Space rock the size of the Great Pyramid of Giza to skim Earth NASA has been tracking an asteroid the size of Great Pyramid of Giza which is travelling at 29,000mph. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:The New Health Care: Heart Stents Are Useless for Most Stable Patients. They’re Still Widely Used.Google Makes Its Special A.I. Chips Available to OthersQ&A: Feline FoodiesHe Took a Drug to Prevent AIDS. Then He Couldn’t Get Disability Insurance.SpaceX video: Footage captures Elon Musk's reaction to incredible Falcon Heavy launchLIFE AFTER DEATH: ‘NO HEAVEN just infinite sadness, blackness and the knowledge I’m dead’