Racetrack Playa in Death Valley National Park, California comprises the mysterious stones that move and inscribe trails on their own. These straight long tracks (10 to 100 m) found behind the rocks mostly run in a parallel that suggest deliberate and intensive inanimate tracks.
The inscribed trails of stones on extremely flat lake bed of Racetrack play a accommodate speculated curiosity regarding its motion mechanism from the 1940s. There exists no evidence or footprint regarding pulling and pushing of the stones. Earlier it was believed it occurs due to UFO crash or some kind of magnetic field. The mystery of sailing stone that has been existed for a hundred years was resolved by Norris et al. With GPS tracking technique and camerawork of the moving stones.
Research on rock movement
Generally, the movement of a rock that has not been observed greatly in nature depends upon various factors. Such as floatation of ice, water, and very high winds. Recent PhD Research Analysis on these mysterious rocks suggests that these rocks travel because of tiny ice rafts which actively minimize the bed friction. Very recent research with novel techniques like GPS fitting, weather analysis and utilizing time-lapse cameras the researchers explains the following facts. In spite of the high temperature prevailing in summer, the weather drops out considerably during winter.
At such times rain develops into a shallow lake and freezes out to a desperately thin film at cold night. Consequently, the morning sun raises the ice temperature and breakdown into tiny patterns. If such patterns found beneath a rock weighing 300 kg, the blowing air and water flow attempts to push the rock. In general, a stone can travel up to two hundred and twenty-four miles and form mud trails. The research found the largest movement of rocks which involved more than sixty in number during the year 2013 on Dec 20. The scientifically equipped stones travel up to 224 m within a period of a year.