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How Air Traffic Control Works

science.howstuffworks.com/transport/flight/modern/air-traffic-control.htm

There are about 5,000 planes in U.S. airspace every hour. How do these aircraft keep from colliding with each other? Learn about the intricate system that guides a plane from takeoff to landing.

Why are some national contests invalid in certain states and other countries?

money.howstuffworks.com/question541.htm

Why are most national contests in the United States, void in Rhode Island? And what does "void where prohibited" mean? Also, why are these contests open only to U.S. (and sometimes Canadian) residents?

Sampson, aka Mammoth: The Biggest Horse Ever

animals.howstuffworks.com/animal-facts/biggest-horse-ever.htm

Sampson was a magnificent Shire horse from the mid-1800s whose incredible size and strength made him a legend in his own time. A true colossus, he dwarfed even the largest of draft horses.

Tanzanite Is Africa's Real Blue Diamond

science.howstuffworks.com/environmental/earth/geology/tanzanite.htm

Tanzanite is so rare, it is sourced from just an 8-square-mile (20-square-kilometer) area in Tanzania. It was first discovered in the late 1960s and it burst onto the jewelry scene thanks to Tiffany & Co.

How Gasoline Works

science.howstuffworks.com/gasoline.htm

Without gasoline, the world as we know it would grind to a screeching halt. The U.S. alone consumes well over a hundred billion gallons of gasoline per year. Learn all about this vital fuel.

The Ultimate Nirvana Quiz

play.howstuffworks.com/quiz/nirvana-quiz

Nirvana set fire to '80s hair rock and blazed a trail through rock history. How much do you know about the band? Get a little grungy, and take this quiz to find out!

Which Sanderson Sister Are You?

play.howstuffworks.com/quiz/which-sanderson-sister-are-you-learn

The Sanderson sisters burst onto our screens back in the 1990s, and we all remember them well. Are you as cruel and intelligent as Winifred ''Winnie'', observant and calming influence as Mary, or crazy and beautiful as Sarah?

The Intriguing World of the Seven of Swords Tarot Card

science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/7-of-swords.htm

he 7 of Swords reveals secrets, deception, and cunning strategies. Uncover the hidden motives and unexpected twists this mysterious tarot card brings—are you ready to see what’s really going on.

Quelle créature mythique garde votre âme?

play.howstuffworks.com/quiz/which-mythical-creature-guards-your-soul-fr

S'il fallait que votre âme soit gardée par une créature mythique, autant qu'elle complimente votre existence en plusieurs points. Savez-vous laquelle vous protège?

Rating Low-Carb Diets for Seniors

health.howstuffworks.com/wellness/aging/senior-health-lifestyle/low-carb-diets-seniors.htm

Low-Carb diets for seniors claim to produce everything from rapid weight-loss to decreased blood pressure. Learn about low-carb diets for seniors.

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