Still thinking about the guy who showed us round the caves yesterday and the way he said, “Yesss!” in an emphatic, mysterious voice after every piece of information he imparted. “And this formation over here, it looks like a woolly mammoth. YESSS!” “Here you can see the algae is green, not grey. Why is this? It is because it is exposed to the shaft of natural light. YESSS!”
