A NASA scientist calls new Martian data "one for the history books." So does that mean Life on Mars? Heavens no, says NASA. It was all just a misunderstanding. Tune in Monday to find out. Meanwhile, Elon Musk wants to send millions of people to Mars. How? Perhaps reusable rockets. Have they found the gene that makes us human? Oh, c'mon. You know perfectly well that no single gene makes us human.

Canids galore: Where did dogs come from? Bad news for bulldogs. Pleiotropy, pre-adaptation, and the domestication of silver foxes. Silver Fox, blogging geology. It's Sand Dune Week!