Asteroid WARNING: Space rock packing 560 MEGATON blast power could hit Earth in 2023 AN asteroid measuring 700ft-across and weighing 13 billion tonnes could slam into the Earth with the force of a 560 megaton nuclear bomb as early as August 2023, NASA has warned. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Global Health: Russian Trolls Used Vaccine Debate to Sow Discord, Study FindsAurora Australis in pictures: NASA’s stunning photos of Southern Lights snapped from ISSPurveyors of Juice-Box Style, Nicotine-Filled E-Liquids Quit Selling the ProductsTrilobites: The Mysterious Green Orbs That Float by Day and Sink at NightThey will RUN OUT OF WATER: US drought hits 10 states affecting 131MILLION peopleHurricane Lane satellites pictures: NASA tracks Category 3 cyclone as it barrels towards H