London, Aug 5 : British professor Paul Davies has claimed that the best
place to look for messages from aliens is not in space, but inside our
own bodies.

Davies was quoted by NewScientist as saying, "that our DNA is the right
place to look for a coded message from aliens," and believes that the
cosmic greetings could have been planted into human bodies with the
help of a virus.

http://www.123bharath.com/india-news/index.php?action=fullnews&id=6515
May be a bit far fetched but anything is possible.