<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><head></head><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="font: 12.0px Helvetica"></span><span style="letter-spacing: 0.0px">"A Martian dust devil roughly 12 miles high (20 kilometers) was captured whirling its way along the Amazonis Planitia region of Northern Mars on March 14. It was imaged by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. Despite its height, the plume is little more than three-quarters of a football field wide (70 yards, or 70 meters).</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">Mars' Whirling Dust Devil Video:</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; color: rgb(31, 0, 172); "><span style="text-decoration: underline ; letter-spacing: 0.0px"><a href="http://www.nasa.gov/multimedia/videogallery/index.html?media_id=139018061http://www.nasa.gov/multimedia/videogallery/index.html?media_id=139018061">http://www.nasa.gov/multimedia/videogallery/index.html?media_id=139018061http://www.nasa.gov/multimedia/videogallery/index.html?media_id=139018061</a></span><span style="letter-spacing: 0.0px color: #000000"> </span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">Dust devils occur on Earth as well as on Mars. They are spinning columns of air, made visible by the dust they pull off the ground. Unlike a tornado, a dust devil typically forms on a clear day when the ground is heated by the sun, warming the air just above the ground. As heated air near the surface rises quickly through a small pocket of cooler air above it, the air may begin to rotate, if conditions are just right.</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">The image was taken during late northern spring, two weeks short of the northern summer solstice, a time when the ground in the northern mid-latitudes is being heated most strongly by the sun."</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px"><b>MARS RECONNAISSANCE ORBITER HIRISE IMAGES</b></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">All of the HiRISE images are archived here:</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; color: rgb(51, 0, 255); "><span style="text-decoration: underline ; letter-spacing: 0.0px"><a href="http://hirise.lpl.arizona.edu/">http://hirise.lpl.arizona.edu/</a></span><span style="letter-spacing: 0.0px color: #000000">.</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">More information about the MRO mission is available online at <a href="http://www.nasa.gov/mro"><span style="font: 12.0px Courier; text-decoration: underline ; letter-spacing: 0.0px color: #3300ff">http://www.nasa.gov/mro</span></a>.</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="font: 12.0px Helvetica"></span></div></body></html>