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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?
The Bizarre Link Between van Gogh's Signature Yellow and Cow Urine
entertainment.howstuffworks.com/arts/artwork/indian-yellow-pigment.htm
The bright yellow hue used to great effect by van Gogh and other painters was eventually outlawed, as it was made of urine from dehydrated cows.
The Origins of the Steamship
science.howstuffworks.com/innovation/inventions/steamship.htm
Steamships quickly replaced sails in the early 1800s. Learn more about the origins of steamships and the innovations that led to their creation.
What Are Muscle 'Knots' and How Do You Get Rid of Them?
health.howstuffworks.com/human-body/systems/musculoskeletal/muscle-knots.htm
Surely you've had a knot in your neck at some point. But your muscles really aren't tied in knots. Or are they?
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."
Messerschmitt Bf 109(Me 109)
science.howstuffworks.com/messerschmitt-bf-109.htm
The Messerschmitt Bf 109 is one of few fighters ever to be developed from a light-plane design. Willy Messerschmitt's angular little plane was built in greater numbers than any other fighter. Read how the Bf 109 has been so successful and long-lived.
Are We Entering the Sixth Major Extinction on Earth?
science.howstuffworks.com/life/evolution/sixth-major-extinction.htm
A new global report says 1 million species are at risk of extinction - the greatest number in human history.
How the iPhone Works
electronics.howstuffworks.com/iphone.htm
The Apple iPhone is a cell phone that works like a computer. Get the inside scoop on iPhone technology and the hype around the iPhone releases.
North American International Auto Show 2001
auto.howstuffworks.com/naias2001.htm
The North American International Auto Show kicks off the year with amazing concept cars and hundreds of innovations. Get daily coverage and a front-row seat at the unveilings!
Ultimate Guide to Winnie the Pooh
lifestyle.howstuffworks.com/family/activities/how-winnie-the-pooh-works.htm
Winnie the Pooh remains one of the world's most beloved characters. Go behind the scenes with a guide to the Winnie the Pooh movies and TV shows.