NASA alert! A 'never-before-detected' Asteroid has 72% chances that it may hit Earth on THIS date | Mint MintA NASA Exercise Suggests 72% Chance An Asteroid May Hit Earth On This Day NDTVNASA, Partners Conduct Fifth Asteroid Impact Exercise, Release Summary NASANASA warns of potential planet-sized asteroid impact: There's 72% chance of Earth collision on this date The Economic TimesNASA test shows Earth is not prepared to prevent large asteroid strike Earth.com