Transmissions through time: the 2017 advent calendar
Day 13

Decoding a message

Carl Sagan sets his students a challenge of decoding a message for the aliens.

If life exists elsewhere in the Universe, would we be able to communicate with it? In this video, Carl Sagan demonstrates how we could send a signal that would make sense to intelligent beings that have evolved independently from us.

Carl Sagan gave the 1977 CHRISTMAS LECTURES "The planets". This clip is from his sixth lecture "Planetary systems beyond our sun".