Sailing stones

 These are the rocks in death valley's arid lake beds called The Racetrack, they are stones or rocks that seem to move by themselves, weighing about 320 kilograms.

Yeah moving by themselves, rocks, moving yeah. Some just stay in the same spot for decades, but when they do move they leave a long linear line behind them. Some of these rocks have traveled more than 450 meters.

To figure out why they move scientists put GPS trackers on them and titled the article "The most boring study ever". Two years into the project a couple of scientists went to the racetrack and found that the lake had a thin layer of water, and then one of the rocks moved.

They published the paper saying that there were circumstances that had to be fulfilled for the stones to sail. One: was that it had to have water deep enough for floating sheets of ice to form but shallow enough not to cover the stones. Two: at night the water has to freeze and the ice breaks off to form floating sheets of ice. Three: the wind has to be strong enough to push the ice which in turn pushes the stones allowing them to sail.

Sailing stones, Weeeeeee.