NASA's New Asteroid Alert System Gives 5 Whole Days of WarningUniverse TodayIt was a 10,000 ton meteor that exploded over the Chelyabinsk Oblast, injuring 1500 people and damaging an estimated 3,000 building in 6 cities.Curiosity Mars Rover Checks Odd-looking Iron Meteorite Laser-zapping of a globular, golf-ball-size object on Mars by NASA's Curiosity rover confirms that it is an iron-nickel