Here's a beautiful image of a sliding (or sailing or slithering) stone at Death Valley's famous Racetrack Playa. Cat Connor caught it on Christmas Day 2014.
"What was interesting ... was the development of a small upside-down cumulus on the underside of the cloud head from which delicate curtains of virga could be seen descending."
Photographer Tommy Richardsen called it 'wicked fast,' saying it started a second or 2 before he clicked the shutter button, and faded before the 13-second exposure was over.
Drought plagued California and much of the American Southwest for nearly 5 years before this year. Now satellites see swollen rivers dumping sediments into the sea.
The occultation by the moon of Aldebaran - brightest star in Taurus the Bull - was visible from North America. Great set of photos here from the EarthSky community!