Oxygen is everywhere on Earth today. But that hasn’t always been the case. Scientists think oxygen only became a lasting part ...

Oxygen is considered essential for life on Earth, as most living organisms depend on it to produce energy and survive. However, the way nature works is much more complex and adaptable than we might ...

Ancient enzymes show life’s nitrogen signal stayed unchanged for billions of years, helping scientists read early Earth.

Scientists at the University of California, Irvine have discovered that climate change is causing nitrous oxide, a potent ...