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Is a dead stingray sting still lethal? It's not likely, but a dead stingray's sting will still hurt a lot. Read about a dead stingray's sting here.

Do you know how to choose surround sound? Get familiar with your options and terminology with this guide on how to choose a surround sound system.

Can pets make you happy? Find out if pets can make you happy at HowStuffWorks.

The 'Last Supper' painting by Da Vinci has generated many hidden-meaning theories. Could these theories be real? Learn more about the 'Last Supper'.

The Chicxulub meteor impact may have killed off the dinosaurs. Would they have lived if the meteor missed? Learn more about the Chicxulub meteor.

There are many types of hitch covers. Learn all about hitch covers at HowStuffWorks.

Personal hygiene pictures explore how your daily routine affects your health. Check out these personal hygiene pictures.

Two-line phones incorporate two separate phone lines into one device. Learn how two-line phones work and why business travelers love them.

Paper mobiles are an easy, inexpensive and fun paper craft for kids of all ages. Learn more about the art of crafting inventive paper mobiles.

Hairstyles trends come and go, but some are unforgettable. From the flip to the mullet, revisit these 21 hairstyle trends through the ages.

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