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Why Do Some U.S. Bills Have a Star at the End of the Serial Number?
Most U.S. currency contains a serial number that ends with a letter, but some end or begin with a star instead. What does the letter stand for? What is the significance of the star?
Are You Fit for the Military?
play.howstuffworks.com/quiz/are-you-fit-for-the-military
Do you have what it takes to march shoulder-to-shoulder with a platoon? When you aim as high as the Air Force in this quiz, you'll find out if you have what it takes to serve your country. Will you even make it through boot camp?
Recognizing Cats in Heat (Spoiler: Much Different From Dogs in Heat)
animals.howstuffworks.com/pets/cats-in-heat.htm
Cat owners may notice odd behavior, loud vocalizing or extra affection from their feline friend and wonder what's going on.
Deep Blue: Shark of IMAX-worthy Proportions
animals.howstuffworks.com/fish/sharks/deep-blue-shark.htm
In the world of ocean giants, one name stands out: the Deep Blue shark.
Swordfish vs. Marlin (Yes, They're Different Fish)
animals.howstuffworks.com/fish/swordfish-vs-marlin.htm
They’re both long, sleek, and carry a sword-like bill, but when it comes to swordfish vs. marlin, these titans of the sea are anything but interchangeable. Whether you're into deep sea fishing or browsing seafood menus, knowing the difference between a swordfish and a marlin can make all the difference.
How Roller Coasters Work
science.howstuffworks.com/engineering/structural/roller-coaster.htm
They don't have engines, brakes or accelerators. No, these amazing machines rely on physical, centripetal and gravitational forces to urge thrills, screams and that sinking stomach feeling we all love (and hate). Read more about the science of fun.
1957-1959 Ford Styling
auto.howstuffworks.com/1957-1959-ford-styling.htm
The 1957-1959 Ford styling revolution brought such cars as the Mystere show car and the Skyliner. See pictures and learn all about 1957-1959 Ford styling.
How Genealogy Works
people.howstuffworks.com/culture-traditions/genealogy/genealogy.htm
Building a genealogy, or family tree, can be a huge project. Learn how to research your ancestors and construct a detailed family genealogy.
Plymouth Muscle Cars
musclecars.howstuffworks.com/muscle-car-information/plymouth-muscle-cars.htm
Plymouth muscle cars were synonymous with big engines and even bigger thrills. Check out profiles, photos, and specifications of Plymouth muscle cars.
How to Play Poker Online
entertainment.howstuffworks.com/how-to-play-poker-online.htm
Online poker is a popular pastime these days, one that requires a specific strategy to be successful. Learn more about this strategy.