When I was a teenager, my two scientific passions were astronomy and botany. However, at my school in the early 1960s, one could either do A-levels in Mathematics - Physics - Chemistry (Science A) or Chemistry – Botany - Zoology (Science B). I chose the former option, being very much put off by medicine which was more or less entailed with the latter. Botany still is a scientific passion – if I were time-transported back to the Jurassic I would be eager to investigate the flora, leaving others of the party to keep a watch-out for dinosaurs.