The once very successful group of marine arthropods called trilobites were hit hard by the Ordovician mass extinction and never fully recovered until going extinct 200 million years later. At the end ...

Blood oxygen levels have come into the spotlight this year because health practitioners are using that metric to check for and monitor COVID-19 cases. But blood oxygen, or SpO2, levels have been used ...

Discover the healthy range for blood oxygen levels in adults and learn when a low reading could be a warning sign. This video ...

More than 2 billion years ago, oxygen became a permanent part of Earth’s atmosphere. What happened next has puzzled ...

Oxygen levels in the Earth's atmosphere are likely to have "fluctuated wildly" 1 billion years ago, creating conditions that could have accelerated the development of early animal life, according to ...

Rapid changes in marine oxygen levels may have played a significant role in driving Earth's first mass extinction, according to a new study led by Florida State University researchers. About 443 ...

Get your news from a source that’s not owned and controlled by oligarchs. Sign up for the free Mother Jones Daily. Off the coast of southeastern China, one particular fish species is booming: the ...

A new study is investigating whether ear oxygen monitoring could be more precise than fingertip tests.

Oxygen was pumped into a castle moat after reports of fish in distress, the Environment Agency has said. Officers from the ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A doctor has disproved the myth that face masks or coverings lower ...