radio

Here he is talking to BBC Radio 4's Sliced Bread.

You're scrolling through your phone you've got the radio, you've got the TV.

I’m a former math teacher, speechwriter, Google techbro, and current host on public radio.

And I basically copied him, but I turned from looking for radio signals with an intelligent message to looking for signs of life by way of biosignature gases in a planet atmosphere far away.

The Drake Equation is an equation that helps illustrate how likely it might be that there is an intelligent civilization out there sending us a radio message.