@bbcradio4: When one exasperated scientist, Paul Crutzen, interrupted a conference in Mexico, he proclaimed we are not longer in the same geological period but instead coined, ‘The Anthropocene’ - the age of humans. This led to earth scientists determing when exactly this change happened - the answer, 1st November 1952, but why? Listen back to the full series where Hannah Fry follows the numbers on thrilling journeys of data and discovery. Along the way we meet the remarkable people who dug into the data and unearthed something extraordinary. Uncharted with Hannah Fry | Listen on BBC Sounds 🎧

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Thursday 24 September 2026 15:32:52 GMT