アメリカ内務省のインスタグラム(usinterior) - 1月5日 02時02分

Go at your own pace. Beautiful traveling rocks have been one of the most enduring mysteries at Death Valley National Park in #California. The Racetrack Playa is a dry lakebed with hundreds of rocks leaving clues to their travels with winding trails. Some of the rocks, which weigh up to 700 pounds, have traveled over 1,500 feet.

For years, the source of their movement had gone unsolved, but in 2014 researchers discovered a rare combination of events that move the rocks. When the playa floods and cold #winter nights freeze the water into a thin layer of ice that then break into large floating panels as night turns into day, winds drive the rocks forward across the slippery surface, which leave trails in the soft mud below. Although #scientists have discovered the secret of the moving rocks, the fascination remains the same.

"I know it's only rock 'n' roll but I like it, like it, yes, I do" - Rolling Stones

With such a fragile surface, we can all do our part to maintain this remote area and keep it fascinating and mysterious for years to come. Photo @DeathValleyNPS by Shu Xu (www.sharetheexperience.org). #usinterior #rocknroll #beautyscrolling #DeathValleyNationalPark #DeathValleyLove

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