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.
For more articles about astronomy, visit Scoop.it | Science News.
____________________________________________________________
I don’t normally publish blog articles on Tuesdays (or Thursdays) but I saw this last night and couldn’t resist!
