People look for meteorite fragments in a snow covered field in the Yetkulski region outside the Urals city of Chelyabinsk February 24, 2013. A meteor that exploded over Russia's Ural mountains and sent fireballs blazing to earth has set off a rush to find fragments of the space rock which hunters hope could fetch thousands of dollars a piece. REUTERS/Andrei Romanov (RUSSIA - Tags: SOCIETY SCIENCE TECHNOLOGY) less