November 26, 2012

How Do We Know Earth Is 4.5 Billion Years Old?

Dan Vergano, USA Today

AP Photo

Football is fun for bickering, but for really wrecking family dinners over the Thanksgiving holidays, try tackling the week's political argument over the age of the Earth.

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TAGGED: Radiometric Dating, Lead, Meteorites, Earth


October 21, 2013
How Science Figured Out Earth's Age
Paul Braterman, Scientific American
Aristotle thought the earth had existed eternally. Roman poet Lucretius, intellectual heir to the Greek atomists, believed its formation must have been relatively recent, given that there were no records going back beyond the... more ››