10 Crazy Facts You Didn't Know About Animals

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Eco Engineers: 5 Animals That Can Reshape Earth's Waterways

Eco Engineers: 5 Animals That Can Reshape Earth's Waterways

Animals leave their marks on the ecosystem in ways you probably never imagined. Learn about five that can affect the waterways at HowStuffWorks.

Author's Note: 10 Crazy Facts You Didn't Know About Animals

I seldom pitch article ideas, but I made an exception here. The idea came from watching one of my daughter's favorite TV shows, a nature-education program called "Zaboomafoo" hosted by the Kratt Brothers, from which both of us have gathered some amazing knowledge. Early on, I learned that kangaroos use their tails as kind of a third leg when hopping slowly, which for some reason fascinated me, and each time I've shared the knowledge with friends I've gotten the same response: I didn't know that! So I decided to go deeper and learn some other facts. I left out my daughter's enthusiastic recommendations because I thought my readers might already know them, but in case you're interested: Gazelles run really fast; cheetahs eat gazelles; and lions eat zebras. (I'm guessing we'd watched a predator episode that day.)

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