On Science Blogs: News from Mars, or not; and the gene that makes us human, or not.

Last Friday's On science blogs collects bloggers' accounts of the Mars news that wasn't, or was, or might be. And it likewise tries to sort out the news of a gene that might, or might not (I vote not) make us human.

Find Tabitha M. Powledge's On science blogs here.

-Paul Raeburn