those of you following the continuing debate about the potential for life to survive on arsenic, might take offense to the song's notion that the discovery expands the possible types of lifeforms that can exist.
i will leave you with some of the reasonable response from the makers of the movie:
We’d like to defend our honor just a little bit in regards to the arsenic debate. Certainly, we know it is a very contentious subject, but we felt we couldn’t really do the whole controversy justice in the context of this parody, so we went with the brief mention. Are we trying to say this is a comprehensive look at everything about astrobiology? Of course not, and we understand you weren’t implying that it was supposed to be. But if we can pique the scientific curiosity of even a few young people, and get them interested in pursuing this field, that’s a win for us.