Dyson Spheres: A Civilization Hiding in Starlight

In 1960, physicist Freeman Dyson published a strange proposal in Science: look for extraterrestrial civilizations through their heat instead of only listening for radio waves. If a society captured most of a star's light to run its machines, the visible light would be held back.

In 1960, physicist Freeman Dyson published a strange proposal in Science: look for extraterrestrial civilizations through their heat instead of only listening for radio waves. If a society captured most of a star's light to run its machines, the visible light would be held back.

In 1960, physicist Freeman Dyson published a strange proposal in Science: look for extraterrestrial civilizations through their heat instead of only listening for radio waves. If a society captured most of a star's light to run its machines, the visible light would be held back.

In 1960, physicist Freeman Dyson published a strange proposal in Science: look for extraterrestrial civilizations through their heat instead of only listening for radio waves. If a society captured most of a star's light to run its machines, the visible light would be held back.