These underground rodents are the first mammals found to actively choose air with lower-than-normal oxygen levels. Their ...

Pulse oximeters use light to measure how much oxygen is in a person’s blood. For most people, a normal pulse oximeter reading is between 95% and 100%, researchers said in background notes. Readings ...

Neural tissue normally dies quickly without oxygen. Yet bird retinas—among the most energy-demanding tissues in the animal ...

Fingertip monitors known as pulse oximeters that can be used at home to detect low blood oxygen levels (hypoxaemia) give ...

Have you ever felt "off" and gotten bloodwork done, only to find out your results were all within the "normal" range? That ...

Fingertip monitors known as pulse oximeters that can be used at home to detect low blood oxygen levels (hypoxemia) give ...

The discovery fundamentally changes the understanding of a structure in the avian eye that has been misinterpreted for centuries.

"What is good for the heart is good for the brain," one researcher says.

Bird retinas survive without oxygen by burning sugar scientists solve 300 year mystery that could help treat human strokes.

When oxygen disappears, most fish suffocate. This one ferments its own metabolism and waits months for spring beneath frozen ...