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Even the Smartest Mathematicians Can't Solve the Collatz Conjecture
science.howstuffworks.com/math-concepts/collatz-conjecture.htm
The Collatz conjecture can be worked on by 9-year-old math whizzes, but it's flummoxed some of the greatest minds of the past century. Will it ever be solved?
Empty Pill Bottles Piling Up? Here Are 15 Great Ways to Reuse Them
home.howstuffworks.com/green-living/uses-old-pill-bottles.htm
Wondering what to do with those plastic pill bottles your prescriptions come in? Here are 15 great ways to reuse them and keep them out of the landfill.
Get Cracking! 10 Ways to Reuse Egg Cartons
home.howstuffworks.com/green-living/ways-to-reuse-egg-cartons.htm
Egg cartons, whether cardboard, plastic or Styrofoam, can be reused for lots of projects in your home or garden. Here are 10 eggs-citing ones to try.
How the Pneumatic Tire Keeps the Our World Going 'Round
science.howstuffworks.com/innovation/inventions/pneumatic-tire.htm
The pneumatic tire revolutionized transportation and a number of other industries that rely on air-cushioned rubber tires.
What Is the Oldest Tree in the World?
science.howstuffworks.com/life/botany/oldest-tree-in-world.htm
In the quest for the title of world's oldest tree, there's some stiff competition, as well as questions surrounding the way we define "oldest."
Am I Cold-Blooded?
play.howstuffworks.com/quiz/am-i-coldblooded
We all like to think that we're nice people, but some of us are definitely nicer than others. If you want to find out whether you're secretly Mr. Rogers or whether you're secretly Regina George, this quiz will tell you the truth!
What is clean coal technology?
science.howstuffworks.com/environmental/green-science/clean-coal.htm
Clean coal reduces the harmful emissions caused by the burning of fossil fuels. Learn about the development of clean coal and the uses for clean coal technology.
40 Home Remedies for Arthritis
health.howstuffworks.com/wellness/natural-medicine/home-remedies/home-remedies-for-arthritis.htm
There are many home remedies that can help you cope with arthritis. Learn what simple household treatments can ease and even prevent arthritis pain.
How Green Pavement Works
science.howstuffworks.com/environmental/green-science/green-pavement.htm
Green pavement is porous, meaning that it permits water to seep through to the ground. Learn why green pavement is good for the environment.
Why do groups like PETA oppose the Iditarod?
animals.howstuffworks.com/animal-facts/peta-oppose-iditarod.htm
Iditarod protests are conducted each year by animal rights groups, such as PETA. Learn more about Iditarod protests and reasons for Iditarod protests.