“Tharp’s work certainly provided evidence and weight to the theory of plate tectonics, but her work is really about seafloor ...

Photo: Harry Hess argues that the continents had once been one, and have drifted apart. With the discovery of plate tectonics and the mapping of the earth into about 12 plates, plus the ...

It confirmed sea-floor spreading as hypothesized by Hess, and thus "continental drift," originally proposed by Alfred Wegener back in 1912. It convinced many that plate tectonics was the best ...

Scientists have now identified a strange slice of Earth deep below the Pacific that may explain why this region is currently creating the world's fastest spreading ocean ridge – the East Pacific ...