The Polymath's Stone

Thomas Young was born on June 13, 1773, in Somerset, England, eldest of ten in a Quaker family. By two, he read fluently. By fourteen, he knew Latin, Greek, French, Italian, Hebrew, Arabic, Persian, and Syriac. He studied medicine at Edinburgh, Gottingen, and Cambridge, but was never primarily a doctor. He was a problem solver who happened to have a medical degree.

In 1801, Young shone light through two narrow slits onto a screen. If light were particles, it should show two bright lines. Instead: alternating light and dark bands -- interference. Light behaves like a wave. Two overlapping waves reinforce or cancel each other. The experiment was elegant and deeply counterintuitive. It took decades for acceptance, but Young had proven light's wave nature.

a copy of the rosetta stone -- the ancient egyptian decree inscribed in hieroglyphics, demotic script, and greek, which young began to decode. source: wikimedia commons

Young also proposed that the eye contains three types of color receptors -- the trichromatic theory underlying modern color science and how screens display color using RGB pixels. In 1814, he turned to the Rosetta Stone, identifying cartouches as royal names and decoding hieroglyphic phonetic values. Champollion built on his insights to publish a full decipherment in 1822. Young also developed Young's modulus, a measure of material stiffness.

Young died in 1829 at 55. Too broad for easy remembrance, too interdisciplinary for a discipline-obsessed age. But he demonstrated that tools from one field unlock problems in another. Wave mechanics for light, pattern recognition for language, mathematics for materials. Today we call it interdisciplinary thinking. Young just called it thinking.