Imagine a world millions of years ago, teeming with creatures unlike anything we see today. Among them slithered animals that ...

Scientists assumed that the clitoris was vestigial or even lost in some species of ... In others, hemipenis-like structures in hermaphroditic snakes had also been dubbed hemiclitores. In a review ...

accompanied by a tiny vestigial second lung. Protecting these delicate organs, a snake can have up to 400 pairs of ribs and as many as 24 muscles are involved with the movement of each pair.