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How Does Your Stomach Keep From Digesting Itself?
health.howstuffworks.com/human-body/systems/digestive/question464.htm
How does your stomach keep from digesting itself?
How many calories does a person need daily?
health.howstuffworks.com/wellness/food-nutrition/facts/question457.htm
Daily calorie needs vary significantly from person to person. Learn how to calculate the number that’s right for your body.
How Refractive Vision Problems Work
health.howstuffworks.com/human-body/systems/eye/vision-refractive.htm
Millions of people have refractive vision problems -- when the eyes get blurry or can't focus on an object. Learn about four major types of refractive vision problems.
What makes your knuckles pop?
health.howstuffworks.com/human-body/systems/musculoskeletal/question437.htm
What makes your knuckles pop, and is it really bad for you?
How Fast Does Hair Grow?
health.howstuffworks.com/skin-care/hair-care/scalp-treatments/question251.htm
Anyone who's ever regretted a haircut has probably wondered how fast their hair will grow back. It's a good question, with a not-so-simple answer.
How Much Oxygen Does a Person Consume in a Day?
health.howstuffworks.com/human-body/systems/respiratory/question98.htm
How much oxygen does a person consume in a day?
How can an egg carton claim that the contained eggs have less fat and more vitamin E?
health.howstuffworks.com/wellness/food-nutrition/vitamin-supplements/question304.htm
I recently bought a carton of eggs that claimed, "These eggs are high in Vitamin E, contain 100 mg of Omega 3, and have 25% less saturated fat than regular eggs." How can you get chickens to lay these special eggs? And how can you tell which eggs have these properties without cracking them open?
How do antibiotics work?
health.howstuffworks.com/medicine/medication/question88.htm
Where do antibiotics come from, and how do they fight bacteria?
How does the sense of smell work?
health.howstuffworks.com/mental-health/human-nature/perception/question139.htm
What causes smell? When I walk into a bakery, I smell the bread. What actually has happened? Do objects give off pieces of matter? What has entered my nose to cause the sensation of smell?
How long can a germ live in a room?
health.howstuffworks.com/diseases-conditions/infectious/question235.htm
How long can a germ live in a room? My son had a friend over, and the friend was coughing all over the house. How long can his germs infect people?