Add Yahoo as a preferred source to see more of our stories on Google. Your blood's natural limit to how much oxygen it can hold means you can't stockpile it. Lisa520/E+ via Getty Images You need to ...

In a hot spring at Yellowstone National Park, a microbe does something that life shouldn’t be able to do: It breathes oxygen and sulfur at the same time. Take a deep breath. A flow of air has rushed ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Why do humans and animals have to breathe? – ...