Astronomers have located the edge of the Milky Way’s star-forming disk for the first time, showing that star formation is focused within 40,000 light-years of our galactic center.
Human history is littered with expired civilizations, and scholars and archaeologists have made a determined effort to understand why and how civilizations collapse. They've found that symptoms like a growing wealth gap and distrust of the elites are precursors to civilizational collapse. But what about global technological civilizations like the one we live in now? How long can they last? What causes their collapse? How can they recover?

