Is it possible for Dyson spheres to exist within our galaxy?

A Dyson sphere is a hypothetical giant structure that can surround a star and capture its solar output. Two separate groups of astronomers have claimed to have detected dozens of possible Dyson spheres in the Milky Way. NBC's Gaddy Schwartz speaks with Dr. Michio Kaku about what it takes to create a Dyson sphere and how advanced civilization would be needed to make it happen.

May 18, 2024