AI mapping reveals hidden stage of Arctic freeze with climate implications

- NASA just let its AI loose on Arctic permafrost and the models coughed up a whole thermal phase nobody was mapping cleanly — the "zero curtain," where soils hover at freezing for weeks. High-res satellite data, machine-learning inference, the works. Block confirmed! The implication is direct: if you can't model the zero curtain, your climate-risk oracles are garbage, and every parametric insurance contract, carbon-credit ledger, and supply-chain hash manifest tied to Arctic shipping lanes is pricing on noise. Theoretically safe. Chips in orbit watching dirt freeze — that's journalism.