Picture the vast expanse of ocean you've seen in postcards or vacation photos - that brilliant blue stretching endlessly ...

A vast ocean chock-full of microbes may have once covered more than a third of Mars's surface, according to a new analysis of ...

A scuba diver until age 79, Georgette Apol Douwma photographed reefs around the world and then transformed her images into dazzling kaleidoscopic designs. Photographer Georgette Apol Douwma’s ...