Or ET might've left us a message. Saw an article a couple of months ago that suggested that the SETI people should be looking at bacteria for evidence of ET instead of data from Arecibo, anyone remember it? Can't find it to save my life now.
oops. Sorry Guys, I killed that ET data carrying bacteria when I used Lysol to clean my kitchen floor. But the Lysol did leave a clean fresh smelling scent if that is any consolation.