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 ...

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

Brine pools, extremely salty, oxygen-free underwater lakes, are lethal to most marine life but teem with resilient microbes.

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

Reduced blood flow to the brain is thought to be a key factor in many forms of dementia, including Alzheimer's, and ...

The light-sensitive tissue of birds’ eyes is not supplied with oxygen by blood vessels – instead, it powers itself with a ...

When you’re short on sleep and your focus suddenly drifts, your brain may be briefly slipping into cleanup mode. Scientists ...

This article was reviewed by Darragh O’Carroll, MD. Key Takeaways: Testosterone’s reputation for causing anger and aggression ...

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

KBIA’s Rebecca Smith recently sat down with Dr. Mohammad Badran at the University of Missouri who studies sleep apnea to ...