A clever way to estimate enormous numbers - Michael Mitchell

View the full lesson here: http://ed.ted.com/lessons/michael-mit...

Have you ever tried to guess how many pieces of candy there are in a jar? Or tackled a mindbender like: "How many piano tuners are there in Chicago?" Physicist Enrico Fermi was very good at problems like these -- learn how he used the power of 10 to make amazingly fast estimations of big numbers.

Lesson by Michael Mitchell, animation by Mark Phillips.