资讯

PBS2 年
A Science Odyssey: People and Discoveries: Hess proposes sea-floor spreading - PBS
Hess proposes sea-floor spreading 1960. 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 ...
PBS1 年
A Science Odyssey: People and Discoveries: Hess proposes sea-floor spreading
Hess proposes sea-floor spreading 1960. 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 ...