A study suggests that horses who know their trainers have a good concept of person. However, a trainer working with a new horse can expect less success.
Scientists are concerned that melting water in the Arctic Ocean could change global ocean circulation patterns, alter climate and decimate marine fisheries.
California condors were all but extinct a few decades ago. Their numbers are up, and they are now at the center of the controversy over lead hunting ammunition.
Ryan Kerney and a team of biologists found green algae living inside salamander embryo cells, the first cellular-level symbiosis ever seen in a vertebrate.
High-precision measurements of Earth's gravitational field by the GOCE satellite produced the most detailed mapping yet of gravity across the Earth's surface.
Japan's meteorological agency has issued a tsunami warning for a wave of up to one meter, following a strong earthquake today near the east coast of Honshu.