from Phys.org Are asteroids humanity’s ‘greatest challenge’? by Mariëtte Le Roux Close encounter: NASA graphic showing asteroid 1998 QE2, which caused a brief scare when it skimmed past Earth in 2013. But one day a space rock is bound to be on target, say worried scientists Throughout its 4.5-billion-year history, Earth has been repeatedly pummelled […]
Published on June 30, 2017 15:08