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Humans essentially stop growing after puberty, but do their ears keep right on growing? Find out whether ear growth never stops at HowStuffWorks.

Humans go crazy for cuteness, whether its babies, kittens or ... cars. Find out why humans go crazy for cute things at HowStuffWorks.

The first drink can relax you, the fifth can be dangerous. How does alcohol make you drunk? Find out at HowStuffWorks.

Should you open a brewski instead of a conditioner? Learn whether beer is really good for your hair at HowStuffWorks.

It can be embarrassing, but it also may be a survival skill. Why do some people get flushed when they drink? Learn more at HowStuffWorks.

Are humans built to drink milk as adults? Find out why most adults around the world can't drink milk at HowStuffWorks.

How much dirt do I eat in a year? More than you might think. Can dirt help keep us healthy? Find out at HowStuffWorks.

Is fast food addictive? What's the science behind those cravings? Find out at HowStuffWorks.

Some people say that wheat has compounds in it that make it addictive. But is this true? Find out if wheat is toxic at HowStuffWorks.

Pulled an all-nighter last night? You're a danger to yourself and others. Find out why sleep deprivation is such a hazard.