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New measurements of deuterium near the center of the Milky Way suggest that most of the deuterium is cosmological in origin and that much of the deuterium that is seen near the galactic bulge is being brought in from outside the galaxy by molecular clouds falling inwards. (Courtesy, Lubowich/Pasachoff/Harcourt Brace)
Reported by: Lubowich et al., Nature, 29 June 2000