[Dr. Sivana]

The discovery of a split-second burst of radio waves by scientists using the Arecibo radio telescope in Puerto Rico raises major new questions over what caused it.

My guess is that its an old radio broadcast of George Burns and Gracie Allen hawking Carnation evaporated milk that's been bouncing around for 70 years.

[Eric in the Ozarks]

Decades of many thousands of AM radio broadcasts...
Where did they go ?

[Dr. Ursus]

I objects- it was Amos and Andy!