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 ...

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

The Arctic ground squirrel survives conditions that would cause irreparable brain damage in almost any other mammal on the ...

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

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 ...

This article was reviewed by Felix Gussone, MD. Key Takeaways: Cholesterol is a key building block for testosterone. Through ...

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

Heart diseases are rising due to unhealthy lifestyles, stress, poor diet, inactivity, and smoking. Adopting healthy habits ...

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