Messages sent to deep space

Radio waves (including those used for broadcast television) are a form of light.  As such, they travel at the fundamental 'speed of light' through space.  Since we've been broadcasting radio waves for communication and entertainment for decades, this means that these signals are now tens of light years away from the Earth.  Might they be the first thing any other intelligent life form in the galaxy discovers about us?




This is from "abstruse goose".  I can't find any information about the author besides the signature (?) at the top.  Here's where you can find the original: http://abstrusegoose.com/163