Thumbs Up or Down

In the American movie Interstellar, when earth begins to become uninhabitable, 10 astronauts are sent through a wormhole to a group of planets orbiting a supermassive black hole. These astronauts are supposed to explore the planets to see if they are inhabitable or not.

However, when communicating their findings back to earth, they don’t transmit long lists of data. Instead, if the area they’ve explored could sustain human life, they simply activate the “thumbs up beacon.”