Thomas O'Brian

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.

time, relativity, clocks, einstein

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.

time, date, leap year, calendar


Michael Pollan Talks Plants and Food

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Forensic Files


Mystery Box

Tar Noir: Paleoforensics at the La Brea Tar Pits

\tThe La Brea Tar Pits are  world-renowned fossil sites for good reason—they're the mass graves of thousands of Ice Age creatures, each with a story to tell. Researchers at the nearby Page Museum clean the asphalt from the fossil remains, and using paleoforensics, recount the grim details of their deaths. In the process, clues emerge about what life was like in prehistoric Los Angeles.

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