Volcanoes were erupting on the moon as recently as 120 million years ago, evidence collected by a Chinese spacecraft suggests. Until the last few years, scientists had thought volcanic activity ended ...

Scotland’s stormy Pentland Firth is an ideal site for extracting electricity from ocean tides. (Photo by Phillip Capper via Flickr) This is your first of three free stories this month. Become a free ...

A team of Scottish engineers created a new tidal turbine blade that may reduce the cost of converting ocean currents into energy. The University of Edinburgh experts said their invention “reduces the ...