USA Today :: Weather

Strange clouds spotted at the edge of Earth's atmosphere

A weirdly wonderful sight appeared to astronauts aboard the International Space Station this summer thin blue clouds hovering ... <p><a href="http://rssfeeds.usatoday.com/~a/usatoday-WeatherTopStories?a=TM3Dfo"><img src="http://rssfeeds.usatoday.com/~a/usatoday-WeatherTopStories?i=TM3Dfo" border="0"></img></a></p><img src="http://rssfeeds.usatoday.com/~r/usatoday-WeatherTopStories/~4/382461538" height="1" width="1"/>