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What if I wanted to build a Great Pyramid today?
science.howstuffworks.com/engineering/structural/build-pyramid-today.htm
To build a Great Pyramid today you would run into cost and labor issues that didn't exist in ancient Egypt. Learn about building a pyramid today.
What if You Really Ate 50 Eggs Like in 'Cool Hand Luke'?
science.howstuffworks.com/science-vs-myth/what-if/what-if-ate-50-eggs-like-cool-hand-luke.htm
In the classic film "Cool Hand Luke," the title character gulps down 50 hard-boiled eggs in less than an hour. Is this a trick you can (or should) try at home?
What if You Were on an Elevator and the Cable Broke?
science.howstuffworks.com/science-vs-myth/everyday-myths/question730.htm
Elevator cables pull an elevator up and down the shaft. What would happen if they snapped? Find out what would happen if the elevator cables snapped.
What if a black hole formed near our solar system?
science.howstuffworks.com/science-vs-myth/what-if/what-if-black-hole-formed-near-solar-system.htm
Black holes have serious pull, and they're not afraid to use it. Could one of these skulking bad boys ever arise in our home, sweet (solar system) home?
What if a plane landed in San Francisco at the same time there was a big earthquake?
science.howstuffworks.com/nature/natural-disasters/plane-landed-in-earthquake.htm
If a plane landed in an earthquake an number of things could happen. Find out what would happen if a plane landed in an earthquake in San Francisco.
What if an astronaut went on a space walk without wearing a space suit?
science.howstuffworks.com/suitless-space-walk.htm
Because an Earth-like environment is created within a spacesuit, it allows you to walk around in space in relative safety. But outer space is an extremely hostile place and could kill you if you aren't protected.
What if everyone on Earth jumped at the same time?
science.howstuffworks.com/science-vs-myth/what-if/what-if-everyone-on-earth-jumped-at-same-time.htm
The Earth is a pretty stalwart planet, having survived billions of years of punishment at the hands of asteroids and other cosmic bodies. But could it withstand more than 7 billion people jumping up and down in unison? Do we even want to find out?
What if people had evolved as birds?
science.howstuffworks.com/science-vs-myth/what-if/what-if-people-had-evolved-as-birds.htm
If people had evolved as birds, we'd probably lay eggs. Learn more about what would happen if people had evolved as birds at HowStuffWorks.
What if sea levels rose 12 inches?
science.howstuffworks.com/science-vs-myth/what-if/what-if-sea-levels-rose-12-inches.htm
Figuring out how to deal with rising sea levels isn't some kind of purely academic exercise. It's happening. So how do we deal with it, especially if the sea rises a foot in our lifetime?
What if someone shot a gun on an airplane?
science.howstuffworks.com/innovation/science-questions/gun-on-plane.htm
In movies, bad guys can take over an airplane and start shooting up the place. Wouldn't the plane explode or depressurize as soon as the bullet pierced its skin?