Water Before the Sun

The coffee is warm in your hands. The water inside it has been here before. Not here in this cup, not here on this planet — here in the dark between stars, drifting as ice on the surface of grains smaller than the period at the end of this sentence. It was there before the Sun ignited. Before there was an Earth to fall on. Astronomers can tell, because water comes in two kinds — ordinary, and a heavier version called deuterium-enriched, made only in the cold of interstellar space, far from any star. The water in Earth's oceans still carries that signature. Still remembers. When the cloud that would become our solar system began to collapse, roughly four and a half billion years ago, that ancient ice came with it — carried inside the rocks and comets that rained down on the young Earth for hundreds of millions of years, patient as stone. So the oceans did not form here. They were delivered. From somewhere else. From a time when there was no Sun to orbit, no sky above them, nothing alive to drink them. And here is the thing that does not leave you easily: the last glass of water that was ever touched by you is now drifting, molecule by molecule, back out into the world. Some of it will make it further than you can imagine.