A prehistoric Equisetum horsetail plant that survived 400 million years produces oxygen isotopes and water with an extreme chemical signature ...

Oxygen has been the most important gas in our search for life among the cosmos thus far. On Earth, we have it in abundance ...

For the first time, researchers have managed to isolate and directly observe individual oxygen atoms inside liquid water, catching a substance that usually hides behind the familiar H 2 O formula in ...