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Mexico's Giant Crystal Cave Is Beautiful But Deadly
science.howstuffworks.com/environmental/earth/geology/mexico-giant-crystal-cave.htm
Massive gypsum crystals were discovered beneath Mexico's Sierra de Naica Mountain in very inhospitable environs - to humans anyway.
Changing the Guard Is More Than Pomp and Circumstance
history.howstuffworks.com/historical-events/changing-the-guard.htm
While it's technically a glorified shift change, the British monarchy's Changing the Guard ceremony is steeped in history. HowStuffWorks explains.
If You Get 29/35 on This Soccer Quiz, You Can Fake Your Way as a World Cup Referee
www.howstuffworks.com/quiz/you-get-2935-this-soccer-quiz-you-can-fake-your-way-a-world-cup-referee
Not everyone can be a soccer referee, especially in the World Cup. Do you have what it takes? Here's your chance to find out!
SCIFs Are Spy-proof Places for America's Top Secrets
science.howstuffworks.com/engineering/structural/scif.htm
SCIFs are spy-proof, highly secure facilities designed for viewing and working with sensitive national security secrets. We talk to a former general counsel for the NSA to find out how they work.
Lifelike Robo Pets Help Seniors Combat Loneliness
health.howstuffworks.com/mental-health/dementia/robotic-pets.htm
Robotic companion animals have been proven to reduce stress, anxiety and antipsychotic drug use among older people, especially those with with dementia.
How Reverse Phone Lookup Works
electronics.howstuffworks.com/reverse-phone-lookup.htm
Is a random number you don't know blowing up your phone? Try reverse phone lookup and maybe you can solve the mystery of who it belongs to.
How to Make Your Home Energy Efficient
home.howstuffworks.com/green-living/how-to-make-your-home-energy-efficient.htm
Sealing siding cracks, caulking windows, and upgrading attic or siding insulation can give you a more energy efficient home. Learn more.
How PayPal Works
money.howstuffworks.com/paypal.htm
PayPal is the most popular online payment service in use today. Learn how PayPal works, how to use PayPal and about problems with PayPal.
How the Venice Tide Barrier Project Works
science.howstuffworks.com/engineering/civil/how-the-venice-tide-barrier-project-works.htm
It's a recipe for disaster: Venice is sinking, and the waters around it are rising. Can the controversial MOSE project save Italy's famous city with a series of aqua gates?
Can You Identify These Barbie Careers From the Past Four Decades?
play.howstuffworks.com/quiz/can-you-identify-these-barbie-careers-from-the-past-four-decades
Who you callin' a dumb blonde? Far from being just a pretty face, Barbie is a career girl at heart. Sure, she got her start as a model, but Barbie went on to find professional success in medicine, business, professional sports and STEM, not to mention several stints as an astronaut!