The Clock in the Rock
Rutherford, Holmes, and the Race to Date the Earth

About this book:

For centuries, the Earth kept its age a secret. Theologians calculated creation at 4004 BC; geologists read rock layers like unnumbered pages; physicists, armed with thermodynamics, slammed the door shut with a verdict of mere millions of years. *The Clock in the Rock* is the gripping, fifty-year detective story of how science finally cracked the case—turning the planet itself into a clock, powered by the alchemy of radioactive decay.

From Lord Kelvin’s icy calculations to Ernest Rutherford’s flash of insight in a Montreal lab, from Arthur Holmes’s lonely, decade-long crusade to turn lead ratios into a calendar, to Clair Patterson’s obsessive battle against lead contamination in a pristine clean room, this book follows a cast of brilliant, stubborn, often quarrelsome pioneers. They fought not just the rocks, but each other—and the entrenched dogmas of their own disciplines—to hand humanity the most staggering number in science: 4.5 billion years.

Written with the narrative drive of a thriller, *The Clock in the Rock* takes you inside the candlelit forges of the Comte de Buffon, onto the wave-lashed cliffs of Siccar Point where Hutton saw "no vestige of a beginning," and into the mass-spectrometer rooms where the atomic tick was finally counted. It is a saga of paradigm shifts and paradigm shifters, revealing how the deepest questions of time were answered not by a single eureka moment, but by generations of scientists who refused to let the Earth stay silent.