The SciencesOctober 1, 1952
The Origin of the Earth
The emergence of the theory that the solar system coagulated from a vast cloud of dust has led to a new inquiry into the chemical history of our planet
Stories by Harold C. Urey
The SciencesJune 1, 1935
Heavy Water
A New Hydrogen and A New Water, Chemical and Physical Properties Distinctly Different From those of Plain Hydrogen and Plain Water