Until recently, manta rays — which sail through tropical and temperate ocean waters, looking much like enormous kites — were thought to migrate great distances across ocean basins, as do many of the largest marine animals
An experimental solar-powered airplane landed in Spain Thursday, completing an unprecedented three-day flight across the Atlantic in the latest leg of its globe-circling voyage.
Large sections of land on either side of the San Andreas fault are moving up or down every year by a few millimeters, a major form of motion that researchers report in a new study that sheds light on the mechanics of the famous fault line.