Fear-eliciting images of modern and ancestral threats are equally likely to evoke physiological reactions, despite their ...

Introduction: Seeing and knowing -- Ancient snakes, modern snakes: "what is a snake?" -- Ancient snake lizards: the fossil record -- The anatomy of ancient snake lizards -- Ancient snake lizard ...

Snakes have lost the gene that encodes ghrelin, a hormone that helps regulate hunger in many vertebrates, according to a new study.

The opening pages of the 1943 book The Little Prince recall how the narrator, as a child, once drew a picture not of a hat — as every adult insisted it was — but of a boa constrictor that had ...