Sand ripples are symmetrical. Yet wind -- which causes them -- is very much not. Furthermore, sand ripples can be found on Mars and on Earth. They would be even more fascinating if the same effect ...

This is why, in strong winds, we see wind ripples on the water in front of ... but ultimately the spinnaker should look symmetric. The challenge is to balance trimming hard enough to get the ...

Scientists have identified “wave ripples” on Mars, shaped by water and wind approximately 3.7 billion years ago. These ...

"The shape of the ripples could only have been formed under water that was open to the atmosphere and acted upon by wind," study first author Claire Mondro, a sedimentologist at CalTech ...

Wind rippled the lake's incredibly clear water. Sunlight came at just the right angle to throw shadows on those ripples as they chased one another to shore. The effect was mesmerizing, and the ...