PBS Space Time

How to Signal Aliens

Season 1 Episode 25 | 6m 14s  | Video has closed captioning.

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!

Aired: 04/03/16

Rating: NR


Problems Playing Video? | Closed Captioning