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Why is Uranium-235 ideal for nuclear power?

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Nuclear plants provide the world with much of its electricity. Learn why Uranium-235 is ideal for nuclear power, in this article.

Why are visits to the emergency room so expensive?

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Most ER bills are unbelievably expensive. Why is that? Find out why emergency room visits are so expensive at HowStuffWorks.

Why Do We Get So Much Pleasure From Symmetry?

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Why do we love looking at a perfectly stacked display of soup cans or six flower petals around a stamen? Our brains seem wired for it -- but why?

Why 'Black Panther' Is Already Breaking the Box Office

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'Black Panther' is the first superhero blockbuster of 2018, so why all the hype? HowStuffWorks explains why people are flocking to see 'Black Panther.'

Why were women on ships considered bad luck?

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Sailors once considered women on ships bad luck. Find out why at HowStuffWorks.

Why Do People Knock on Wood for Luck?

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Have you ever wondered why people knock on wood for luck? Like many superstitions, the answer goes back as far as pagan rituals.

Why Did the T. Rex Have Such Puny Arms?

animals.howstuffworks.com/dinosaurs/why-did-t-rex-had-such-puny-arms.htm

Tyrannosaurus rex was a giant predator that roamed the earth, so why did it have such tiny arms?

Why is a buckeye seed in your pocket good luck?

people.howstuffworks.com/why-is-buckeye-seed-in-pocket-good-luck.htm

It's good luck to keep a buckeye nut in your pocket. Find out why at HowStuffWorks.

Why Gasoline Prices Vary From Station to Station

money.howstuffworks.com/why-gasoline-prices-vary-from-station-to-station.htm

Two gas stations might face each other on a street in Anytown, USA. Yet their gas prices might be different. Why is that?

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