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How much vitamin D do you get from the sun?

health.howstuffworks.com/wellness/food-nutrition/vitamin-supplements/how-much-vitamin-d-from-sun.htm

Getting vitamin D from the sun is one of the best ways to get your requirements. But exactly how much vitamin D do you get from the sun? Find out.

What are endorphins?

science.howstuffworks.com/life/inside-the-mind/emotions/endorphins.htm

What are endorphins? Learn about endorphins and happiness and HowStuffWorks.

Why are breasts different sizes?

health.howstuffworks.com/wellness/women/general/breasts-different-sizes.htm

Why are breasts different sizes? Find out why different women have different size breasts.

How Viagra Works

science.howstuffworks.com/viagra.htm

Viagra is one of the best-known drugs of all time. Nearly every adult in America has heard of the drug and can tell you what it does. Find out how this high-profile medication works its magic.

How Nicotine Works

science.howstuffworks.com/nicotine.htm

Smoking or chewing tobacco makes many people feel good, even mildly euphoric. It's the nicotine that produces the buzz. Find out how nicotine affects the human body and what makes it so addictive.

10 Ways That Doctors Treated Infections Before Antibiotics

health.howstuffworks.com/diseases-conditions/infectious/10-ways-that-doctors-treated-infections-before-antibiotics.htm

Scientists are now taking a second look at treatments that were popular before the discovery of antibiotics. Learn all about them at HowStuffWorks.

10 Pretty Ways to Use Tomatoes as Garnish

recipes.howstuffworks.com/10-pretty-ways-to-use-tomatoes-as-garnish.htm

Looking for some pretty ways to use tomatoes as garnish? Visit HowStuffWorks to see these 10 pretty ways to use tomatoes as garnish.

5 Rare Parasites Found in the Human Body

health.howstuffworks.com/diseases-conditions/infectious/5-rare-parasites.htm

Rare parasites can be creepy. We're willing to bet that you'd go to almost any length to avoid spending time with the five rare parasites.

What is China's one-child policy?

people.howstuffworks.com/one-child-policy.htm

What is China's one-child policy? Learn about China's one-child policy, implemented in 1979 to reduce the population and stimulate economic growth.

How Shrunken Heads Work

people.howstuffworks.com/shrunken-head.htm

If you think that shrinking a human head isn't possible, read on at HowStuffWorks for a frightening primer on the ritual and those that perform it.

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