Two years after an asteroid exploded over Russia and injured more than 1,200 people, the origin of the space rock still puzzles scientists.
The 66-foot-wide (20 meters) asteroid broke up over the city of Chelyabinsk, Russia, on Feb. 15, 2013, shattering windows across the area and sending many people to the hospital with lacerations from the flying glass.
Originally, astronomers thought that the Chelyabinsk meteor came from a 1.24-mile-wide (2 kilometers) near-Earth asteroid called 1999 NC43. But a closer look at the asteroid's orbit and likely mineral composition, gained from spectroscopy, suggests few similarities between it and the Russian meteor. [Meteor Streaks Over Russia, Explodes (Photos)]
That's rather odd. Just more evidence that there are myriad rogues out there. To read more, click here.