Every molecule of water on the Earth and inside you or any other living thing has existed for billions of years. After it came to Earth, that water has been cycling through rocks, air, animals, plants, and back again. Each molecule has been on an incredible voyage before coming to you. At some point, the water inside you would have been inside dinosaurs, bacteria, the oceans, storm clouds, the polar ice caps, and much more.
Where did water come from? Where has it been? Why does ice float? And how does water break the rules of chemistry? Learn more about why water is one of the weirdest things in the universe with this BBC Ideas animation narrated by science journalist Alok Jha.
Plus, a DIY science experiment: Use a 9-volt battery to break water into its elemental components.
via Aatish Bhatia.