Death Valley’s sailing stones caught on the move
Rock raceway controlled by ice and wind
![sailing stones](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/09/ts_7157686818_ee53eee1ce_o_free.jpg?fit=860%2C460&ssl=1)
ROCK SLIDE Stones such as this one inscribe long trails as they slide across Death Valley. Scientists have found that ice and wind play a role in the rocks’ mysterious movements.
Thomas Hawk/Flickr (CC BY-NC 2.0)