A surprisingly large number of animals change sex over the course of their lives. But why? Is it chemical? Is it due to some sophisticated twist of genetics? In the case of limpets, it’s way simpler than that.
In many ways the science fiction pulps and the science fiction novels of the pulp era were conservative when it came to gender matters. Women – if they appeared at all – were usually relegated to the roles of girlfriends or victims, and sex was never mentioned. Compared to the romance, detective, and especially the…
Late last year, a British hen named Gertie stopped laying eggs. She then started crowing like a rooster, and suddenly her entire appearance seemed to morph into a male. So just what is going on here?