re: Agreed, the problems go deeper than the math
Joe Davis of MIT has shown the viability and practicality of putting messages in the DNA of microbes and thinks that it is one way to send messages across interstellar distances.
Perhaps one is riding now on trillions of aline microbes attached to the dust from another star system, which is pushed out into the galaxy by the solar wind of its parent star. Now imagine that this is what is happening with billions of stars across the galaxy and has been going on for eons.
http://www.viewingspace.com/genetics_culture/pages_genetics_culture/gc_w03/davis_joe.htm
http://www.clondiag.com/art/joe.davis.nature.pdf
http://www.scielo.cl/fbpe/img/ejb/v7n2/a07/t6.html
