An alien arrives at the airfield close to home. He calls me up to arrange 7 pm dinner at a fine-dining restaurant, in celebration of his graduation from some Alien University. We talk for hours, catching up after five years in different solar systems. While sipping on my last sip of wine, my alien friend turns to me and asks: “When are you going to join me on Shimear, my home planet?” I pause for a moment, considering the question. “I think about the answer quite often, my friend – but Shimea...