Cannibal sex and sustainable flowers

How did sex begin exactly? Not just last night, but way, way back in the primordial soup? A new history of sex posits our earliest encounters as a cannibalistic act. Historian David Baker discusses how that evolved into modern human intimacy. And if flowers are your go-to gift, you might want to reconsider. Cut flowers have a bigger carbon footprint than you might realise. So is there a sustainable way to give a bouquet?