Breathe easy, for now. Scientists say our breathable air won't last forever. A new NASA-supported study warns that Earth's oxygen supply is not a permanent feature of our planet. Though we often take ...

Inhaling oxygen on Earth is quite easy ... figure out when we’ve completely tipped the scales and Earth could not go backward to an anoxic atmosphere.” “When sulfur isotopes say the ...

While Earth's slowdown is not noticeable on human timescales, it's enough to work significant changes over eons. One of those ...

"With this model, we offer the most complete possible understanding of this cycle on a large scale ... consuming more oxygen than they produce, making them a growing sink of atmospheric oxygen.