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Experts say there's no real benefit from retesting experienced drivers, except in special situations. HowStuffWorks looks at the reality.

Cashmere is super-soft and luxurious, and super expensive. HowStuffWorks talks to experts about where cashmere comes from, and why it's so costly.

Its blooms are lovely. But to many, the Bradford pear tree's smell and invasiveness are anything but.

Reporting tip income isn't the most complicated thing in the world, but it does require some careful record-keeping. Learn how to report tip income.

How can you not embarrass your tween? Check out these tips for how not to embarrass your tween at TLC Family.

HowStuffWorks looks at the history of Arlington Cemetery's Tomb of the Unknown Soldier, and the Army's elite Sentinels who guard it, 365 days a year.

Before the widespread use of DNA, establishing the paternity of a child was a tricky business. Ever heard of the oscillophore?

HowStuffWorks looks at Devil's Den, Gettysburg, Pennsylvania and examines stories about its ghosts.

Discover the origins of the continental drift theory and how scientists explain these geologic phenomena.

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

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