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The little flies have way more in common with us than you think. And it made them the perfect test animal to send to space.

HowStuffWorks looks at exactly what lice are and how to get them out of your beard.

What is narcolepsy? In the movies, people who are narcoleptics just fall asleep out of nowhere - is this true?

Cats will catch birds and mice, but rats? Not so much. HowStuffWorks finds out why.

Some foods will give you more gas than others (we're looking at you beans). Learn why some foods are more gas-inducing at HowStuffWorks.

If dinosaurs hadn't gone extinct, you wouldn't exist. Extinction may seem inherently bad, but sometimes the death of a species encourages new life.

Do food packaging chemicals seep into your food? Find out if food packaging can affect nutritional value of food at HowStuffWorks.

Working in some circus jobs is not for the faint-hearted. Read on to find out which circus job is the most dangerous.

HowStuffWorks takes a look at the fascinating case of a woman who experienced ectopic lactation after childbirth.

Think you can tell the facts from myths of climate change? Find out with this HowStuffWorks quiz.

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