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How Two-line Phones Work
electronics.howstuffworks.com/two-line-phone.htm
Two-line phones incorporate two separate phone lines into one device. Learn how two-line phones work and why business travelers love them.
75 of the Hardest Riddles (With Answers) to Test Your Brain
lifestyle.howstuffworks.com/family/activities/hardest-riddles.htm
Challenge yourself with some of the hardest riddles we could find so you can keep your mind sharp! As you tackle these tricky brain teasers, you'll engage your mind in a way that few other activities can.
Trivia Quiz of the Day
play.howstuffworks.com/quiz/trivia-quiz-of-the-day
Are you a wealth of unless information? Do you belong on "Jeopardy?" Do you win every trivia night at the pub? Then, this quiz is for you! Test your smarts with this assortment of random trivia questions.
What are the odds there is life in outer space?
science.howstuffworks.com/space/aliens-ufos/extraterrestrial-life-odds.htm
Are we alone? Jodie Foster's character in "Contact" didn't think so, and neither do the scientists who've been listening for an extraterrestrial message for decades.
NAT: How Network Address Translation Works
computer.howstuffworks.com/nat.htm
Network Address Translation helps improve security by reusing IP addresses. Learn about Network Address Translation and NAT security.
98% of adults can't pass this elementary school science quiz! Can you?
play.howstuffworks.com/quiz/98-adults-cant-pass-this-elementary-school-science-quiz-can-you
From the periodic table to inventors and their inventions, how well do you remember your science class lessons? Do you think you could pass general science? Let's find out with this quiz!
How many atoms are in a person?
science.howstuffworks.com/atoms-in-person.htm
Atoms: the building blocks of life and the universe. We're all made of these microscopic bits of matter, but how many does it take to make a complete human being? And exactly what kinds of atoms do we have inside us?
How Encryption Works
computer.howstuffworks.com/encryption.htm
How secure is the Internet for sending sensitive information? Learn all about encryption, authentication, hash algorithms and more.
1971 Harley-Davidson XLH Sportster
auto.howstuffworks.com/1971-harley-davidson-xlh-sportster.htm
The 1971 Harley-Davidson XLH Sportster was offered in a patriotic red, white and blue paint scheme. Learn about this Harley-Davidson motorcycle.
Can You Ace This 12th Grade Physics Quiz?
play.howstuffworks.com/quiz/can-you-ace-this-12th-grade-physics-quiz
You're gonna have to get PHYSIC-al with this quiz. It's so easy, a high schooler can do it! Actually, some of them can't. Do you think you can get a better score than a 12th-grader?