We are sending a coded message to potential intergalactic neighbors. If you received such a message, how would you decode it? See http://www.newscientist.com/news/news.jsp?id=ns99991757 for an introduction to the problem. I’ve taken a stab, using MATLAB, at decoding the alien message. Take a peek. If you want to know exactly what the message codes for, look here. Turns out the whole thing is being guided by two Quebec physicists.