The origin of water on Earth is a complex affair. Was it trapped in the rocks that formed our planet or was it brought by comets and asteroids afterwards? We do not know for sure, but we can move the question even further. Did the water form with the Sun and the planet, or is it even older than that? A new discovery might hold the answer. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

Standard water is made of two hydrogen atoms and one oxygen atom. But there is a version of hydrogen called deuterium. Just like hydrogen, it has one proton and one electron, but it also has one neutron, making it heavier. Water made of two deuterium atoms and one oxygen is known as heavy water.

Heavy water is often associated with nuclear power plan

See Full Page