(CBS News) For our final lesson on a day focused on all things (kind of, sort of) educational, we have the latest from a man who has managed to make us ponder a few times in the past if there might be ...

"And it's a sound that's very similar to kind of the tones you'd get on a cello." Melany Hunt, a mechanical engineer at Caltech. The dunes sing when sand avalanches down the side, "which would then be ...