Could it happen to us here on Earth. NASA released their data today on the Mars atmosphere. It was blown away by solar winds which created the dry red Mars we know today.
We finally have an understanding of what happened to the water on Mars. NASA researchers have just announced that Mars' once rich atmosphere was stripped by solar winds in the early days of the Solar System, causing the planet to dry out.
Solar winds blast out from the Sun at around a million miles per hour, but fortunately Earth is protected from these by our magnetic field. Mars used to have one of these, but lost it billions of years ago, which allowed the ions in its atmosphere to be effectively blown away.