The radio telescope at the Arecibo Observatory in Puerto Rico can do something that most radio telescopes can't: it can transmit. And that's useful for something other than sending messages to the stars: it might just help save the world one day.

More about the Arecibo Observatory: http://www.naic.edu/

Behind the Scenes, including helmet-cam footage of the walk to the telescope, over on the Park Bench:    • Behind the Scenes at the Arecibo Radi...  

Camera and audio mix: Matt Gray http://mattg.co.uk
Animation: Mat Hill https://mat-hill.xyz/
Edited by: Michelle Martin @mrsmmartin

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