Space shuttle science shows how 1908 Tunguska explosion was caused by a comet

The mysterious 1908 Tunguska explosion that leveled 830 square miles of Siberian forest was almost certainly caused by a comet entering the Earth's atmosphere, says new Cornell University research. The conclusion is supported by an unlikely source: the exhaust plume from the NASA space shuttle launched a century later.

If you want to include this story in your blog, copy and paste this formatted text:

<p><a href="http://www.physorg.com/news165077281.html">Space shuttle science shows how 1908 Tunguska explosion was caused by a comet</a></p> <p>The mysterious 1908 Tunguska explosion that leveled 830 square miles of Siberian forest was almost certainly caused by a comet entering the Earth's atmosphere, says new Cornell University research. The conclusion is supported by an unlikely source: the exhaust plume from the NASA space shuttle launched a century later.</p>