[Detour] Searching for Black Hole Collisions at the LIGO

This episode explains how scientists built a machine so sensitive that your heartbeat standing next to it would ruin the experiment...and why they put it in the middle of the Washington desert. We walk through the control room where gravitational wave detections happen, with a working LIGO scientist as our guide. We explain what it means that space itself can stretch and squeeze, and why the signal they caught in 2015 had been traveling for 1.3 billion years before anyone caught it. We talk about Einstein getting fact-checked by a journal reviewer, refusing to believe it, and eventually being proven right sixty years after he died. And we look at what's coming next: a detector in space with arms two and a half million kilometers long that might — just might!!!— let us hear the echo of the Big Bang.