In one part of Death Valley, it has been a mystery for some time as to how heavy boulders move across the desert, leaving a trail in the desert floor behind them.
That mystery has now been solved. It turns out that thin ponds of ice water forms to allow the rocks to slide across ice when blown by the wind.
The reason I’m posting this is that I found one part of the story rather humorous. The researchers installed a weather station and put GPS equipment on rocks. They brought in their own rocks because:
(The National Park Service would not let them use native rocks, so they brought in similar rocks from an outside source.)
Yes, we wouldn’t to interfere with the native rocks! Credit to researchers for believing that similar rocks would do the trick.