A partial solar eclipse will occur over North America this afternoon and evening beginning at 1:52pm PDT, 3:18pm MDT, 4:41pm CDT, and 5:51pm EDT.
The mysterious moving rocks of Racetrack Playa in Death Valley National Park have fascinated and perplexed visitors for decades. Scattered across the usually dry lake bed, the stones occupy the ends of furrows, or "trails," that the stones apparently plow in the lakebed as they move, propelled by some mysterious force.
Explanations for this odd desert phenomenon have ranged from strong winds and thick sheets of ice lifting the rocks to an algal mat on the lakebed surface that becomes slippery when wet. read more