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Space Time

Have They Seen Us? | Space Time | PBS Digital Studios

April 18, 2017

Are aliens watching Earth TV? We'd like to credit the SKA Organization for the image used in the thumbnail.

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Sources and further reading:

The Square Kilometer Array

Eavesdropping on Radio Broadcasts from Galactic Civilizations with Upcoming Observatories for Redshifted 21cm Radiation
Loeb & Zaldarriaga 2007, Journal of Cosmology and Astroparticle Physics, 1, 20

Costs and Difficulties of Large-Scale 'Messaging', and the Need for International Debate on Potential Risks
Billingham & Bedford 2011
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Written and hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Grayson Blackmon
Made by Kornhaber Brown (

Comments Answered by Matt:


Douglas Oak

Grin Reaper Of Trolls



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