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Some people hear what they see. HowStuffWorks looks at the science.

What makes for the perfect nap? HowStuffWorks asks the experts.

The FDA is supposed to ensure the food we eat are safe. Stuff They Don't Want You To Know looks at whether the foods we eat are actually safe.

HowStuffWorks explores little-know facts about belly buttons, like why there is lint inside and why some people don't have a navel.

HowStuffWorks looks at eyebrow shapes throughout history and the celebrities who pioneered the looks from Marlene Dietrich to Cara Delevingne.

Activated charcoal is popping up everywhere. HowStuffWorks takes a look at the pros and cons of eating the black stuff.

Some people's sleep cycles are simply out of tune with the rest of the world. HowStuffWorks looks at the science of insomnia.

HowStuffWorks talks about some of the things health insurance doesn't usually cover in the U.S., like hearing aids, LASIK and infertility treatments.

Scientists have discovered what they are calling a new organ. HowStuffWorks takes a look at the science.

HowStuffWorks looks at whether LASIK surgery lasts a lifetime or if you sometimes need a touch-up procedure or have to start wearing glasses again.

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