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 ...

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 ...

Courtney Coco was found dead in 2004 nearly 200 miles from her Louisiana home, but it would years to unravel the complicated ...

Numerous studies have shown COVID infection ups the risk of heart problems, including heart attacks, strokes, damage to the ...

A new study explains why current brain theories fail to fully explain near-death experiences and consciousness.

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

Netmums’ Louisa Sherlock’s baby was rushed to hospital with RSV when he was five weeks old. Here she shares her story, and ...

The Buffalo Bills have been preparing for the altitude in Denver prior to their playoff game against the Broncos.

Carbon monoxide poisoning remains a serious and often overlooked danger, especially during the colder months when heaters, ...