On this day in 1974, scientists at the Arecibo Observatory in Puerto Rico sent the first message intended for alien lifeforms. See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.

On this day in 1974, scientists at the Arecibo Observatory in Puerto Rico sent the first message intended for alien lifeforms. See omnystudio.com/listener for privacy information.

On this day in 1974, scientists at the Arecibo Observatory in Puerto Rico sent the first message intended for alien lifeforms.&nbsp;See <a href="https://omnystudio.com/listener" rel="noopener noreferrer">omnystudio.com/listener</a> for privacy information.

Earth's first message for extraterrestrials is sent into space - November 16th, 1974

From the desk of “Stuff You Missed in History Class,” “This Day in History Class” quickly recounts a tidbit from today’s events in history.

Share Earth's first message for extraterrestrials is sent into space - November 16th, 1974

Sign up to save your podcasts

Earth's first message for extraterrestrials is sent into space - November 16th, 1974

Earth's first message for extraterrestrials is sent into space - November 16th, 1974