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Why Did the Aztec Empire Fall? How Indigenous Allies Helped the Spanish
history.howstuffworks.com/world-history/why-did-the-aztec-empire-fall.htm
In the early 1500s, the Aztecs ruled a sprawling empire across central Mexico. Their capital city, Tenochtitlán, was the largest city in the Americas at the time.
How Vaccines Work
health.howstuffworks.com/wellness/preventive-care/vaccine.htm
A vaccine is, essentially, a cure for an illness or disease. Who came up with the idea for vaccines and do we give too many shots now?
How Flamethrowers Work
science.howstuffworks.com/flamethrower.htm
When humans discovered fire, they learned to cook their food in a controlled environment. What came next? Flamethrowers, of course. What do flamethrowers have in common with their living counterpart -- fire breathers?
How Interplanetary Internet Will Work
computer.howstuffworks.com/interplanetary-internet.htm
Can the Internet stretch out to planets like Mars? Learn how it will!
The Tuned Mass Damper: How Science Could Earthquake-Proof the Skyscrapers of Tomorrow
science.howstuffworks.com/engineering/structural/smart-structure.htm
Smart Structures will completely change the way buildings react to earthquakes! See how they will work!
How Light Propulsion Will Work
science.howstuffworks.com/light-propulsion.htm
Like many new technologies, light propulsion was originally conceived as a tool of war and national defense. But the "Star Wars" missile defense system may eventually send rockets, rather than missile-destroying lasers, into space.
How Electronic Ink Works
electronics.howstuffworks.com/gadgets/high-tech-gadgets/e-ink.htm
Electronic ink promises to be an amazing, breakthrough technology that we will all be using in five years -- it will completely change books and newspapers!
Why do people collect shark teeth?
animals.howstuffworks.com/fish/sharks/shark-teeth.htm
Collecting shark teeth is a hobby for many people, but why do we do it? Learn why collecting shark teeth is like gathering up pieces of history.
Are grease cars legal?
auto.howstuffworks.com/fuel-efficiency/vehicles/grease-car.htm
A grease car can save you a lot of money on fuel, but can it also cost you in fines from the government? Learn about grease car legality and the EPA.
What brought bison back from the brink of extinction?
animals.howstuffworks.com/endangered-species/bison-extinction.htm
Bison extinction seemed imminent during the 1800s, as the market for buffalo hide boomed. Learn how men like Teddy Roosevelt prevented bison extinction.