Amazing Dust Storm on Mars - Scientists recently were amazed at the photos of the dust devils from Mars shown. The photos were captured by the Mars Reconnaissance Orbiter that has been sending photos of Mars to astronomers here on Earth. The dust devil shown in the photo was 100 feet wide. The dust devils will be a major problem if astronauts are to visit Mars. The dust devils can be up to 10 times larger than earth tornados and rotate at 70 miles an hour.