http://phys.org/news/2014-04-astronauts-reveal-sobering-asteroid-impacts.html

""This network has detected 26 multi-kiloton explosions since 2001, all of which are due to asteroid impacts. It shows that asteroid impacts are NOT rare—but actually 3-10 times more common than we previously thought."

Ak to teda nie je len reklama na ten ich system:P