It is one big mystery that a stone that weighs more or less like a man can move on its own. This has become quite a puzzle for the past decade. The mysterious sailing stones of Death Valley have been discovered to slide over valleys that people do not live in. These valleys are filled with dry cracking muddy ground during summer and ice during winter. Many geologists have gone to all the places in Racetrack Playa and its surrounding.
The mysterious sailing stones of Death Valley slide on very smooth ground and leave a trail behind. Some geologists came up with the conclusion that the mysterious sailing stones of death valley move through the smooth ground when the mud is wet and the stones have little ice droplets on them with the help of the wind. This is however not entirely true because the stones move during the summer when the temperature is too high and even dries the stones themselves.The mysterious sailing stones of Death Valley not only slide on smooth ground but dig and leave shallow track in their wake.
The mysterious sailing stones of Death Valley are a magnificent phenomenon in the sense that they can take different turns around each other. This is mind challenging because the mysterious sailing stones of Death Valley start moving in a parallel direction.
As the years proceed, each stone takes its own different path. Some stones make linear turns others make oval turns while others create a wavy shape on their tracks. No one has ever seen them move and nobody knows the speed they move with. The mysterious sailing stones of Death Valley turn while they are sliding through the flat leveled valley and this leaves different tracks behind them. Some stones move further than others over two to five years.
source : planetoddity