NASA Science News for August 16, 2013
New research shows that an asteroid exploding over Russia earlier this year created a belt of 'meteor dust' that circulated through the stratosphere for at least three months.
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2013/15aug_russianmeteorplume/ (http://science.nasa.gov/science-news/science-at-nasa/2013/15aug_russianmeteorplume/)