- Most of the time, you inhale about 1.6 gallons (6.1 liters) of air a minute. That works out to 96 gallons (363 l) per hour and just over 2,300 gallons (8,706 l) per day. That’s a lot of air!
- No one knows why, but experiments have shown that your lungs work hardest in the late afternoon. Between 4:00 and 5:00 p.m., lungs take in 15 to 20 percent more air than at any other time of day.
- Most scientists think that people—and other animals—yawn when they’re tired or bored. They say yawning sends a quick shot of oxygen to the cells. But that doesn’t explain why yawning is contagious, so researchers are still looking for answers.
- Most people can hold their breath for about a minute, but the world record is 15 minutes and 2 seconds. It was set by Tom Sietas of Germany on August 9, 2007.
- After an insect molts, or sheds its skin, it gulps extra air. This stretches the new outer covering before it hardens so the insect has more room to grow.
Looking for more Gross & Goofy Body facts? Check out Blasts of Gas: The Secrets of Breathing, Burping, and Passing Gas. To find out more about the whole Grosss and Goofy Body series, read this very thorough review from School Library Journal.