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Chosen by the Conservative Party, Liz Truss succeeds Boris Johnson to become the U.K's prime minister, the 15th to serve under Queen Elizabeth.

A friend of mine nearly died from heat stroke, and it was a major emergency. What causes someone to almost die from a little heat?

Tickling yourself is a lot harder than it seems. Have you ever wondered why you cannot tickle yourself? Find out why self-tickling seems impossible.

How do sunless-tanning products work? Which is the most effective: self-tanning lotions or tanning pills?

What are chiggers, and do they bite you or burrow under your skin? How do they work?

Cholesterol is vital because of the role it plays in body chemistry. Learn what it produces in the body, including estrogen, testosterone and bile.

What is the most expensive wine - and why? Visit HowStuffWorks to find out which wine is the most expensive and more.

How does sodium tallowate work in cleansers? Find out how sodium tallowate works in cleansers at HowStuffWorks.

The world's healthiest cake actually tastes better than you would assume something that healthy would. Learn about the world's healthiest cake.

Counterfeit detector pens use special chemicals to spot a fake bill. How do they do it?

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