We Drink Good 4.5-Billion-Year-Old Water

Water is crucial for the emergence and evolution of life on Earth. Recent studies water content in early forming planetary systems similar to our own show that an abundant ubiquitous molecule, initially synthesized surfaces tiny interstellar dust grains by hydrogenation frozen oxygen. then enters a cycle sublimation/freezing throughout successive phases system formation, namely, hot corinos protoplanetary disks, eventually be incorporated into planets, asteroids, comets. The amount heavy measured Earth suggests substantial fraction terrestrial was inherited from very first Solar System formation 4.5 billion years old.