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The NFL Rules Quiz!

play.howstuffworks.com/quiz/the-nfl-rules-quiz

You watch the games, you wear the jersey, and you even have NFL socks - but do you know the rules? In this quiz, we'll test your knowledge of the NFL rulebook, from the basic to the challenging. Game on!

Coming Attractions: Who Picks the Movie Trailers We See?

entertainment.howstuffworks.com/movie-trailers.htm

The following article preview is rated "E" for Everyone. We'll now explain how movie trailers are selected.

6 Facts About How Bees Learn, Think and Make Decisions

animals.howstuffworks.com/insects/bee-facts.htm

Bees can learn, make decisions and have a sense of smell 100 times more sensitive than ours. Here are some cool facts about bees.

Sailfish Are Super-fast, Stunning and Smart Ocean Predators

animals.howstuffworks.com/marine-life/sailfish.htm

Sailfish are the fastest known animal in the ocean. Just how fast? As fast as a cheetah. That's how fast.

10 Least Educated States: High School Completion Rates and More

people.howstuffworks.com/least-educated-states.htm

Education levels vary widely across the U.S., and some states consistently fall behind in both school quality and degree attainment.

How does a Crookes' radiometer work?

science.howstuffworks.com/question239.htm

I once saw this device shaped like a light bulb. It had a vertical support inside it, and on that support there were four vanes with four diamonds on the end. One side of the diamond was black and the other was white. I did a little research and found out that it was called a Crookes' radiometer -- how does it work?

How did public fountains, like those in Rome, work without any type of motor to pump the water?

science.howstuffworks.com/engineering/structural/question33.htm

Rome is famous for having large public fountains that work without the use of any kind of mechanized pump. How were these fountains able to generate enough water pressure without a motor? Check out this article for the answer to this question.

1920 Harley-Davidson 20-J

auto.howstuffworks.com/1920-harley-davidson-20-j.htm

The 1920 Harley-Davidson 20-J was part of the Harley racing team that dominated in the 1920s. See pictures and learn about this Harley-Davidson bike.

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