Racetrack Playa in Death Valley, a long stretch of mud in California (USA), is a strange landscape.
Strangest of all are some stones that are scattered about the size of a pebble into a human. What they have in this rocks of amazing are leaving a trail of motion, as if they had crawled across the floor. Some tracks are straight and have only a few meters long, but others have extensions that reach the two goals of a football field, curve or cross each other. Nobody has actually seen them move the rocks. Popular explanations ranging from a powerful magnetic energy fields or absurd alien interventions.
Two geologists had proposed that whirls of dust are those that cause the strange movement, perhaps in combination with intermittent flooding beach. The results weren’t conclusive. Other scientists pointed to ice formed in the plain in the winter. Planted a wooden sticks around the stones, with the idea that if the ice sheets were responsible, the sticks was frozen by ice, immobilizing the stones. But some stones continued their journey.
In my opinion, it is an amazing case! I thought it was impossible for anything to move unless a force acts to push it, but I see that it isn’t. I think we should advance forward in the investigation because it could be a great achievement for science.
• I took this article from: http://www.abc.es/ciencia/20130618/abci-como-mueven-solas-piedras-201306181327.html
• The original source is: http://www.nasa.gov/topics/earth/features/roving-rocks.html