An image taken of the North Caspian Sea earlier this month puzzled even NASA scientists. It shows what appears to be a concentration of scour marks crisscrossing a section of the water.


An image taken of the North Caspian Sea earlier this month puzzled even NASA scientists. 
According to Yahoo News, it shows what appears to be a concentration of scour marks crisscrossing a section of the water.
The agency even sent out a tweet challenging the public to identify the strange phenomenon. 
Though there were suggestions that it could be the result of a propeller or motor boats, the source was confirmed by a Russian scientist.