
Sep. 24, 2010
Testing Relativity With Better Clocks
With a precise enough clock, it's possible to test the time-dilation effects predicted by Einstein's theory of relativity -- without a space ship.

Feb. 29, 2008
Telling Time: Leap Year, Leap Day
This Friday is a date that comes only once every 28 years - Friday, February 29th. We'll talk about leap years, leap days, and the finer points of telling time.
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FEATURED PLAYLIST
- Insectopedia
We are fascinated by them, frightened by them, and can't live without them -- so...
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Why do cockroaches spend so much time cleaning themselves?
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Can entomophagy, the eating of insects, help improve the world’s food resources?...
- The Superorganism
Ira talks with eminent biologist Edward O. Wilson and Bert Holldobler about ants...
- Tracking an Amphibious Caterpillar
Several newly-discovered species of caterpillar in Hawaii function equally well ...
