Scour marks in the Caspian Sea

We recently came across this story about scour marks on the floor of the Caspian Sea. It is believed the scour marks are caused by ice that forms in the winter months and is then broken up and blown … [Read more...]

NASA and Japan make ASTER imagery available for free

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is one of the instruments on NASA's Terra satellite. Although it is a NASA satellite, the instrument belongs to Japan’s … [Read more...]