Lisa Find Love

In 1962, at a girls' school in Tanganyika (now Tanzania), Africa, some schoolgirl giggles turned into a countrywide health crisis. And, to this day, the laughter remains a mystery.

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How many wheels are in the world is a hotly debated question swirling around the internet. But it's not that easy to answer.

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Dividing fractions is easy once you learn a couple of rules and remember three words — keep, change and flip.

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Cesar Chavez was able to do something nobody before him could — organize abused farmworkers through nonviolent resistance. His work transformed their lives forever.

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Your kitchen sponge can harbor some pretty gnarly stuff if you don't replace it often enough. But how often is enough?

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Running through the extreme heat, elevation, snow or incredibly rough terrain in an ultramarathon is a challenge designed to defeat all but the most determined and prepared.

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You may have never cleaned your dryer vent before but there are many reasons why you should. Plus, it's pretty easy to do. We'll show you how.

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