One of the commenters Dustin posts an answer to one of the featured mysteries:

The moving rocks was solved years ago. In a nutshell, the playa is very dry, getting only a few centimeters of rain per year. In the winter, when it does rain, the slightly tilted playa gets accumulations of water a few centimeters thick at one end. It gets cold enough for the water to freeze on top. When the Sun comes out, the ice begins to melt, forming large chunks called rafts. The wind blows these rafts (which are typically a few millimeters thick), which then hit the rocks and push on them. The ground is softened by the water, so the rocks can move more easily … and then they do.

Have you seen any or all of these and do you have any theories to share?

Feel free to comment with your ideas.