Evolution, sex and dinosaur necks.
They are among the largest and most fascinating creatures ever to have walked the Earth.
I’m talking about sauropods, the group of four legged dinosaurs that are almost instantly recognisable due to their long necks, each of which reaches out to a small head, and long tails.
Among the sauropods is the famous Diplodocus, and less well known, but even more remarkable species such as Argentinosaurus, which holds the record for being both the heaviest land animal ever, and the longest.
But what have these giants got to do with sex?