What is heavy water?
Heavy water is water containing a higher proportion of deuterium isotopes (deuterium), either deuterium oxide, D2O or ²H2O, or deuterium protium oxide, HDO or H¹H²O.Unexpected discovery: Age of water
Everyone knows Earth, the Sun is very oldDetermining the origin of water on Earth
For many years, scientists have argued about the origin of water on Earth: available or brought by meteors.