New Theory May Have Solved the Fascinating Mystery of Sand Ripples on Mars

Common causes have the potential to overturn previous understandings.
Sand ripples are fascinating. They are symmetrical yet wind, which causes them, is very much not. Furthermore, they can be found on Mars and on Earth. They would be even more fascinating if the same effect found on Mars could be found here on Earth as well. What if one unified theory could explain their formation on two different planets of our solar system?

That is what Ben-Gurion University of the Negev physicist Prof. Hezi Yizhaq and Prof. Itzhak Katra and their colleagues from Denmark, Germany, Italy, China, and the US contend in a cover article published in Nature Geoscience.