Underwater Crop Circle Mystery Solved

One of the coolest stories from last week introduced the world to what many are now calling an underwater crop circle. Of course, these sea floor circles have nothing to do with crops, but they are intricate circles, reminiscent of the elaborate crop circles that sometimes turn up in farmers' fields.
The rippling geometric sand patterns are nearly six feet in diameter and almost 80 feet below sea level. But where do they come from? The answer may surprise you.