What would cause a wind pattern that held for at least 60 years to suddenly change? NASA scientists are working to understand the recent quirky behavior of winds in Earth’s stratosphere.Credit: NASA's Goddard Space Flight Center; Kayvon Sharghi, producerThis video is public domain and may be downloaded at:http://svs.gsfc.nasa.gov/12365Read more:http://www.nasa.gov/feature/goddard/2016/a-strange-thing-happened-in-the-stratosphere