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We see faces in clouds, on buildings - heck, in grilled cheese sandwiches. But why is that? And how is this a help to our survival?

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

Can one big hit TV show provide you income for life? Find out if a TV actor can live off royalties forever.

What are carotenoids? Click here to learn exactly what carotenoids are.

Weasels are cute little rodents, but they have a reputation for being one of the worst of the mammals. HowStuffWorks explains how they got a bad rap.

Chinchillas make fairly good long-term pets. HowStuffWorks takes a look at the special needs of these exotic creatures.

The sunfish is one of the gentle giants of the sea. HowStuffWorks explains how why it loves sunbathing, dining on crabs and taking deep ocean dives.

Tarantulas are the largest spiders in the world and, believe it or not, some can live for up to 30 years.

HowStuffWorks explores hematophagy - the vampires of the animal world. And yes, these fish, birds and bats do need to eat blood to sustain life.

HowStuffWorks gets to know the spotted python, which may sound scary, but makes a great pet if you're in the market for a snake.

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