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Are You Smarter Than a 5th Grader: Science Edition!
play.howstuffworks.com/quiz/are-you-smarter-a-5th-grader-science-edition
Do you think you're smarter than a 5th grader when it comes to science? Can you answer these elementary science questions? Let's find out with this quiz!
The Ultimate Astronomy Quiz
play.howstuffworks.com/quiz/astronomy-quiz
Though the astronomy field has evolved from its primitive beginnings, there's still a boundless cosmos to explore. Test your astronomy knowledge with our quiz.
What is the energy source of the future?
science.howstuffworks.com/environmental/energy/energy-source-future.htm
What is the energy source of the future? Learn more about the energy source of the future in this article.
How to Conserve Energy at Home
home.howstuffworks.com/green-living/how-to-conserve-energy-at-home.htm
What is "energy"? Where does it come from? How do we pay for it? Learn the answers to these questions, and find out how to live more efficiently in your home.
How Landfills Work
science.howstuffworks.com/environmental/green-science/landfill.htm
What happens to all of that trash you put on the curb every week? It doesn't just disappear into a parallel universe. Much of it probably goes to the local landfill, and how it gets handled there is a very involved system.
How Long Do Car Batteries Last?
auto.howstuffworks.com/how-long-do-car-batteries-last.htm
All-electric vehicles are becoming increasingly popular, so it's easy to forget that old fashioned, gas-powered cars and trucks are still reliant on electric batteries for their operation. Easy to forget, that is, until those batteries die, either permanently or temporarily. So, it's only natural to ask: How long do car batteries last?
Top 10 Green Heating and Cooling Technologies
Compared to standard heating and air systems, going green is better for the environment -- and your wallet because they use less energy. So what kind of green HVAC systems are on the market today? Read on to find out.
How the Machine Gun Revolutionized Warfare
science.howstuffworks.com/machine-gun.htm
The invention of the machine gun forever changed the battlefield. While soldiers once had to reload after a single shot, they now can fire hundreds of rounds per minute without a single pause.
Cow Burps, Not Farts, Are the Real Problem
health.howstuffworks.com/human-body/systems/digestive/burps-not-farts.htm
How can a feed additive reduce cow burps? Learn how a feed additive reduce cow burps at HowStuffWorks Now.
Orion Nebula Is Scene of Epic Star Battle
science.howstuffworks.com/orion-nebula-is-scene-epic-stellar-battle.htm
In this stellar nursery, firstborn stars are ruthless.