A Moment of Science

Posts tagged circumference

July 15, 2008

 

Shadows of a camel caravan

Measuring the Earth with Camels

After proving that the earth is round, third century B.C. thinker Eratosthenes had the information he needed to measure the earth’s circumference.

September 27, 2003

 

Changing Gears

In our high-tech world it’s easy to forget the simpler things. Take a bicycle, for instance. No engine, no computerized braking system, no fancy fuel injection: all you need is air in the tires and off you go. Simple, that is, until you take a closer look at bicycles with multiple speeds. How do all […]

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