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How is volcanic ash made?
science.howstuffworks.com/nature/natural-disasters/volcanic-ash.htm
Volcanic ash is what's left after a volcano literally blows its top. Learn how volcanic ash can devastate everything under its gray blanket.
How long can a human survive in outer space?
science.howstuffworks.com/question540.htm
How long can a human survive in outer space? In science fiction movies, this seems to be an area of much creative license, with some people exploding instantly, and others surviving for nearly a minute without long-term ill effect. I read once that one's blood would boil, but I read elsewhere that this isn't true. So what is it?
How long does it take for Zoloft to work?
science.howstuffworks.com/life/inside-the-mind/human-brain/how-long-zoloft-work.htm
Odd as it may seem, many antidepressants like Zoloft having warning labels about increases in suicidal thoughts. Why would that be? And how will you know if your medication is actually working?
How long does it take to excavate an archaeological dig site?
science.howstuffworks.com/environmental/earth/archaeology/excavate-archaeological-dig-site.htm
To excavate an archaeological dig site a great deal of time and patience is required. Find out how long it takes to excavate an archaeological dig site.
How many atoms are in a person?
science.howstuffworks.com/atoms-in-person.htm
Atoms: the building blocks of life and the universe. We're all made of these microscopic bits of matter, but how many does it take to make a complete human being? And exactly what kinds of atoms do we have inside us?
How many planets in our universe could support life?
science.howstuffworks.com/planets--universe-support-life.htm
We don't know the answer to how many civilizations might exist in the universe. But we do know the factors that allow life on Earth. Are there other planets that fit the bill? Oh yes indeed.
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.