On this day in 1908 - June 30th - an asteroid impact leveled hundreds of miles of Siberian forest around Tunguska.

The event is classified as an impact even, but is thought to have been caused by a meteoroid exploding above ground. No impact crater has ever been found.


Mona Evans
For news, activities, pictures and more, sign up to the Astronomy Newsletter!

http://www.bellaonline.com/newsletter/astronomy