When the Map Is Wrong

In 2013, a group of scientists sat down to redraw the habitable zone using better physics and better data, and when they finished, something unsettling had happened. Earth — our one confirmed living planet — was suddenly right at the edge. This episode is about what happens when a "settled" scientific concept gets unsettled. And about a second finding, hiding in the same recalculation, that quietly changed the question the field was really asking.