AMA | September 2024

11544.168 - 11565.855 Sean Carroll

And these were dubbed the horizon and flatness problem. And so Dickey and Peebles gave—sorry, I think it was Dickey who gave some lectures at— Cornell, where Alan Guth was a postdoc at the time, and Guth went to those lectures. That's where he heard about these cosmological problems. Guth was trained as a particle physicist, and he was mostly thinking about particle physics and symmetry breaking.