About Space / AstronomySpace / Astronomy100 Years of Space Rock: The Tunguska Impact- June 30, 2008 At around 7:17 on the morning of June 30, 1908, a man based at the trading post at Vanavara in Siberia is sitting on his front porch. In a moment,...http://space.about.com/b/2008/06/30/100-years-of-space-rock-the-tunguska-impact.htm |