Beneath 2,800 metres of Antarctic ice, a multinational team has recovered air bubbles containing the actual atmosphere of a world that existed 1.2 million years ago — long before human industry, long before human memory. Drilled at Little Dome C over four Antarctic seasons, the Beyond EPICA core extends Earth's direct climate record by 400,000 years, reaching across the Mid-Pleistocene Transition, when the planet's ice-age rhythm mysteriously lengthened from 41,000 to 100,000 years. What scientists now hold is not a model or an inference, but a physical sample of a climate system in the act of