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How to Signal Aliens

Everyone has their own opinion as to whether or not aliens exist. But let’s assume they do for a second and we wanted to let them know we're here!!!! How should we signal our species' existence through the expanse of space? There are a few options, but which is the most effective and the cheapest? Find out in this week’s episode of PBS Space Time!
Season 1 Episode 18 Length 06:14 Premiere: 06/17/15

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Specials

Season 1 Episodes

Do Events Inside Black Holes Happen?
S1 E25 Length 11:50 Premiere Date 04/28/16

What Physics Teachers Get Wrong About Tides!
S1 E24 Length 09:09 Premiere Date 09/05/15

General Relativity & Curved Spacetime Explained!
S1 E23 Length 08:52 Premiere Date 07/29/15

Can You Trust Your Eyes in Spacetime?
S1 E22 Length 09:23 Premiere Date 07/15/15

The Leap Second Explained
S1 E21 Length 02:20 Premiere Date 07/08/15

Can a Circle Be a Straight Line?
S1 E20 Length 08:16 Premiere Date 07/02/15

The Calendar, Australia & White Christmas
S1 E19 Length 05:48 Premiere Date 06/24/15

How to Signal Aliens
S1 E18 Length 06:14 Premiere Date 06/17/15

Is Gravity An Illusion?
S1 E17 Length 10:17 Premiere Date 06/03/15

Habitable Exoplanets Debunked!
S1 E16 Length 10:46 Premiere Date 05/27/16

Could You Fart Your Way to the Moon?
S1 E9 Length 05:55 Premiere Date 04/08/16

Space Used to Be Orange!!
S1 E7 Length 05:27 Premiere Date 03/25/15

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