The Roadrunner is the world's fastest-running flying bird. It prefers running
to flying. About the size of a skinny chicken, the speedy birds can take 12
steps in one second. Roadrunners have been clocked zipping across the desert
at speeds up to 15 miles per hour. Learn more
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When
you go to Mars
Who will be the first person to set foot on Mars? It could be you!
The National Aeronautics and Space Administration (NASA) hopes to
send people to the Red Planet sometime in the next 20 years. Read
More in Chain Reaction
Where
in the World Are You?
Imagine you’re sitting in a classroom
in Tempe, Arizona, and you need to tell some students in Russia
where you are. How would you describe your location? Read
More in Chain Reaction
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