Most of us take our oxygen-rich atmosphere for granted. Once upon a time, though, Earth's air was very different.
Scientists and University of Colorado, Boulder may have come up with a way to make hydrogen fuel cleaner.
How do you think a baby's heart rate compares to adults?
The protein myoglobin provides new clues to the evolution of diving in mammals.
Planning on climbing Mount Everest? You might want to plan to be gasping for air. Learn more on this Moment of Science.
Can sleeping in a room full of plants can be dangerous? A common myth states that, at night, plants compete with people for oxygen!
Many indigenous people live in areas of low oxygen concentration with few adverse effects. The big question is, how do they survive?
In movies like Call of the Wild, huskies pull sleds for hundreds of miles over the Alaskan tundra. A Moment of Science wonders, what kind of dogs are sled dogs?
If you have a runny nose and a fever, you'll need to drink more to replace those lost fluids. But why?
Some simple sugars detected by astronomers, glycoaldehydes, are thought to be the basic building blocks of life.