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If you were to move all of the matter in the universe into one corner, how much space would it take up?
science.howstuffworks.com/dictionary/astronomy-terms/question221.htm
If you took all of the matter in the universe and you pushed it all into one corner, how much space would it take up? I am trying to understand how much of the universe is 'empty.'
If the temperature is 30 degrees F, why do we sometimes get snow and other times get freezing rain?
science.howstuffworks.com/nature/climate-weather/atmospheric/question302.htm
Precipitation can vary from rain to snow when the temperature is below freezing. Learn about precipitation.
What exactly is a blueprint?
science.howstuffworks.com/engineering/architecture/question321.htm
If you've ever seen a construction site, you may have noticed that the general plans for construction are drawn out in the form of blueprints. What exactly are blueprints, though, and how are they made? Find out in this article.
How Are People Able to Breathe Inside a Submarine?
science.howstuffworks.com/transport/question83.htm
How are people able to breathe inside a submarine? What do they do to keep the air breathable?
Mars Has a Magnetosphere Problem. Inflatables Could Help
science.howstuffworks.com/mars-has-magnetosphere-problem-inflatables-could-help.htm
Scientists have proposed creating an artificial magnetosphere for Mars with some help from inflatables. Learn more at HowStuffWorks.
Quiz: Apollo 11, the First Moon Landing
science.howstuffworks.com/apollo-11-quiz.htm
Take this HowStuffWorks quiz to learn more about Neil Armstrong, Buzz Aldrin, Michael Collins and Apollo 11, the first landing on the moon.
NASA's 10 Greatest Achievements
science.howstuffworks.com/ten-nasa-achievements.htm
NASA's 10 greatest achievements range from technical feats to displays of human ingenuity. Learn about NASA's 10 greatest achievements.
How Holograms Work
science.howstuffworks.com/hologram.htm
If you want to see a hologram, you don't have to look much farther than your wallet. But the most impressive holograms are large scale and illuminated with lasers or displayed in a darkened room with carefully directed lighting. Learn how a hologram, light and your brain work together make clear, 3-D images.
How C-4 Works
science.howstuffworks.com/c-4.htm
C-4 is a powerful explosive that's used in terrorist attacks all over the world. Find out what C-4 explosives are and what C-4 explosives can do.
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!