Asteroid Impacts On Earth: A Protection Plan
Thursday, July 3, 2008 - 17:21
in Astronomy & Space
A century ago this week, an event in far-off Siberia rang a cosmic wake-up call for Earth. That explosive event over remote Tunguska is generally viewed by scientists as a large space rock that pierced through the atmosphere of Siberia, then detonated to flatten some 2,000 square kilometers of trees.