The Download: surviving extreme temperatures, and the big whale-wind turbine conspiracy

Plus: China is catching up with America's AI lead Climate change is subjecting vulnerable people to temperatures that push their limits. In 2023, about 47,000 heat-related deaths are believed to have occurred in Europe. Researchers estimate that climate change could add an extra 2.3 million European heat deaths this century. That's heightened the stakes for solving the mystery of just what happens to bodies in extreme conditions. While we broadly know how people thermoregulate, the science of keeping warm or cool is mottled with blind spots. Researchers around the world are revising rules about when extremes veer from uncomfortable to deadly.