NASA asteroid tracker: Giant 650FT asteroid is headed for Earth approach THIS WEEKEND A COLOSSAL asteroid twice as tall as Big Ben’s clock tower will shoot past Earth this weekend, NASA’s asteroid trackers have revealed. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:6 Things I Learned About UlcersCarry-On: What Bill Nye Can’t Travel WithoutDAWN OF ROBOT DOMINATION: AI on brink of becoming MORE INTELLIGENT than humans6 Things I Learned About UlcersTrilobites: A Dinosaur Cousin’s Crocodile Ankles Surprise PaleontologistsThe end of plastic water bottles as we know it? Scientists create EDIBLE alternative