And that picture is a bumpy ride, filled with periods of oxygen entering the atmosphere before disappearing again, on repeat, in cycles that lasted tens of millions of years. To look that far back ...

A NASA spacecraft circling Saturn has discovered a wispy oxygen atmosphere on the ringed ... according to a NASA description. [Photos: The Moons of Saturn] The oxygen on Dione may potentially ...

Earth has a surprising new player in the climate game: oxygen. Even though oxygen is not a heat-trapping greenhouse gas, its concentration in our atmosphere can affect how much sunlight reaches ...

NASA's Curiosity rover has detected high concentrations of manganese oxide minerals in Red Planet rocks, suggesting that the Martian atmosphere contained more oxygen ... Mars Photos by NASA's ...

There's something strange about the oxygen in the atmosphere ... Related: Photos: Gale Crater on Mars SAM confirmed that 95% of Mars' atmosphere is made up of carbon dioxide (CO2) and the other ...

Despite orbiting nearly 240,000 miles from Earth, our Moon may be periodically mingling with our planet’s atmosphere. New research shows that oxygen from Earth could be journeying all the way ...

While Venus is made up of about 96% carbon dioxide, scientists just discovered there's atomic oxygen in the planet’s atmosphere. According to findings from a joint project between NASA and the ...

This is the first direct detection of oxygen on Venus, a planet with a thick atmosphere dominated by carbon dioxide. Oxygen accounts for about 21% of Earth's air, with the rest of our atmosphere ...

It is widely believed that Earth's atmosphere has been rich in oxygen for about 2.5 billion years due to a relatively rapid increase in microorganisms capable of performing photosynthesis.

In what marks a significant first for humans to finally travel to Mars, an instrument on NASA's Perseverance rover has successfully converted some of the planet's atmosphere into oxygen ...

A NASA spacecraft circling Saturn has discovered a wispy oxygen atmosphere on the ringed ... according to a NASA description. [Photos: The Moons of Saturn ] The oxygen on Dione may potentially ...