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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.
Oak Ridge, Tennessee: America's Secret Atomic City
science.howstuffworks.com/oak-ridge-tennessee-secret-atomic-city.htm
The Manhattan Project built the city of Oak Ridge in rural Tennessee, where secret facilities produced uranium-235 for the atomic bomb.
Aristides de Sousa Mendes Saved Thousands From Holocaust, But Lost All
history.howstuffworks.com/historical-figures/aristides-de-sousa-mendes.htm
HowStuffWorks looks at the story of Aristides de Sousa Mendes, a Portuguese diplomat who lost everything saving thousands during the Holocaust.
Can You Pass This Basic Trivia Quiz?
play.howstuffworks.com/quiz/can-you-pass-this-basic-trivia-quiz
Do your friends ask you to tag along to trivia night, or are you always left out? Once you pass this basic trivia quiz, you'll prove why you deserve the invitation, or why you should stay at home! Which one will it be?
How the Year 2000 Problem Worked
computer.howstuffworks.com/y2k.htm
Until recently, computer programmers used two-digit placeholders for the year portion of the date in their software. Guess what happened when we realized the system couldn't account for the first two numbers? Mass panic.
How much gold is there in the world?
money.howstuffworks.com/question213.htm
I recall hearing once that all of the world's gold could be formed into a cube measuring 18 feet by 18 feet on a side, or something like that. Is that true? If so, how much would it weigh and how much would it be worth?
Ford Tri-Motor
science.howstuffworks.com/transport/flight/classic/ford-tri-motor.htm
The Ford Tri-Motor was a classic airplane used for military and other applications. See specifications for this classic airplane.
George Adamski and the Space Brothers
science.howstuffworks.com/space/aliens-ufos/george-adamski.htm
George Adamski preached an interplanetary gospel based on contact with UFOs and aliens. Though serious investigators scoffed, he earned wide attention. Read about George Adamski and his "Space Brothers."
Questions to Ask Brain Specialists
Questions to ask brain specialists will help you be more prepared for this conversation. Learn more about questions to ask brain specialists from HowStuffWorks.
Floating Fire Ant Rafts Are Horrifying, Dangerous, Really Cool
animals.howstuffworks.com/insects/fire-ant-rafts-colony-flooding.htm
What's the danger of floating fire ant colony rafts? Learn more about the insect survival strategy in this HowStuffWorks article.