NASA astroid WARNING: DART mission ‘Earth's last line of defence’ NASA is readying to fire a spacecraft into an asteroid, testing Earth’s last line of defence should a rogue space rock veer onto a catastrophic collision course with our planet. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Trilobites: Visualizing the Cosmic Streams That Spew Meteor ShowersTomb of Christ needs MORE restoration after experts find risk of ‘CATASTROPHIC’ collapseScientists make MAJOR anti-ageing breakthrough… and it could help man get to MARSBolzano Journal: Who Killed the Iceman? Clues Emerge in a Very Cold CaseEND OF DAYS? Scientists fear THIS historical event could spark 'apocalyptic' disaster SOONTrilobites: Waking From Hibernation, the Hard Work of Spring Begins