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How many sheets of paper can be produced from a single tree?
science.howstuffworks.com/environmental/green-science/question16.htm
We know that paper comes from trees, but just how much does it take? Let's do the math and figure out how much paper your average tree can be made into.
How many teaspoons are there in a cubic light year?
science.howstuffworks.com/dictionary/astronomy-terms/question208.htm
How many teaspoons are there in a cubic light year?
How much food and water do you need for a one-year stay on Mars?
science.howstuffworks.com/mars-for-a-year.htm
Going to Mars for a year requires that you take a substantial amount of food and water with you. Find out how much you need to take if you're living on Mars.
How much power does the world consume?
science.howstuffworks.com/environmental/green-science/world-power-consumption.htm
World power consumption is dominated by the world's richest countries. Learn about world power consumption and find out how much power the world consumes.
How rare are double rainbows?
science.howstuffworks.com/nature/climate-weather/atmospheric/double-rainbows-rare.htm
A double rainbow, man! Just the sight of one can send us babbling into happiness. And why not? Rainbows are beautiful. And two rainbows at the same time? Even better. But just how rare are these colorful arcs?
How soon will we be able to create a moon base?
science.howstuffworks.com/moon-base.htm
A moon base could allow us to further explore the solar system. Learn about a moon base and find out how soon we will be able to construct a moon base.
How strong are the magnets in an MRI machine?
science.howstuffworks.com/question698.htm
How strong are the magnets in an MRI machine? Can they pull a watch of your arm or even more? Learn just how strong MRI magnets are on this page.
How tall can a tree grow?
science.howstuffworks.com/life/botany/tree-grow.htm
Can a tree grow and grow? Or can a tree grow only to the point that water transport limits it? Learn more about tree growth and the tallest trees.
How the 'Wow!' Signal Works
science.howstuffworks.com/science-vs-myth/unexplained-phenomena/wow-signal.htm
In 1977, SETI volunteer Jerry Ehman saw a transmission so exciting he circled it on paper and wrote the word "Wow!" It seemed to indicate a message from outer space. But what was it really?
How the Airbus A380 Works
science.howstuffworks.com/transport/flight/modern/a380.htm
The Airbus A380 is the world's largest passenger jetliner. Learn about the Airbus A380, the technology behind the A380 and see pictures of an A380 under construction.