This month, compelling evidence for why some species keep their eyes closed for sometimes several weeks after birth, scientists prove that the "nocebo" effect is more potent than a placebo, researchers report what happens when fish eggs and mouse sperm mix, the signals that cells use to measure the lengths of their telomeres, and some clever physics reveals the workings of Darwin's "warm little pond"... Get the references and the transcripts for this programme from the Naked Scientists website