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Introduction
The calendars of the classic Maya
Precession, polaris, and the age of the pyramids
The physics of carbon-14
Calibrating carbon-14 dates and the history of the air
Carbon-14 and the peopling of the new world
Potassium, argon, DNA, and walking upright
Molecular dating and the many different types of mammals
Meteorites and the age of the solar system
Colors, brightness, and the age of stars
Distances, redshifts, and the age of the universe
Parameterizing the age of the universe.

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