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Sperm Banks
health.howstuffworks.com/pregnancy-and-parenting/pregnancy/fertility/sperm-bank.htm
Sperm banks use sperm donors to gather or preserve sperm. Learn how a sperm bank stores sperm and screens donors.
How could a cat scuba dive?
animals.howstuffworks.com/pets/scuba-cat.htm
Scuba Cat is a conundrum: a cat that likes water -- and scuba diving. How could a cat scuba dive? Find out more.
How the Hyperloop Works
science.howstuffworks.com/transport/engines-equipment/hyperloop.htm
Ready for a fifth mode of transportation? Elon Musk is. He's sketched out a proposal for a nearly supersonic transportation system that could shoot you from San Francisco to Los Angeles faster than you can watch an episode of "Game of Thrones."
10 False History 'Facts' Everyone Knows
history.howstuffworks.com/history-vs-myth/10-false-history-facts.htm
Lots of great stories from history we learned in school are just plain wrong. Here are 10 false history facts from HowStuffWorks.
Why Do Leaves Change Color in the Fall?
science.howstuffworks.com/life/botany/leaves-turn-red.htm
If you ever wondered why leaves change color in autumn, you're not alone. Learn why leaves change color, and how they get that vibrant red hue.
How Suspension Bolts Work
auto.howstuffworks.com/auto-parts/towing/equipment/accessories/suspension-bolts.htm
Suspension bolts need to be looked at before you tow. Learn more about suspension bolts at HowStuffWorks.
What's the Difference Between a Mountain Lion and a Cougar?
animals.howstuffworks.com/mammals/cougar-vs-mountain-lion.htm
Puma, panther, mountain cat, mountain lion, mountain screamer, painter, catamount and, yes, cougar. This cat has a lot of names!
What Is an Internal Combustion Engine?
science.howstuffworks.com/innovation/inventions/internal-combustion-engine.htm
Explore the mechanics and inner workings of the internal combustion engine, an innovation of the Industrial Revolution that transformed transportation.
You're Definitely a Kid of the '90s if You Played POGs
entertainment.howstuffworks.com/backyard-fun-games/pogs.htm
Before there was Pokemon, there were POGs. This little round disc game was all the rage on playgrounds across the globe. Even Bart Simpson played. Did you?