The motto of the Olympic Games is citius, altius, fortius: faster, higher, stronger. And yet there are physical limits to what the athletic human body can achieve.\ Not so with the mind. The abilities of the human mind know no limit, and nowhere is this more apparent than in the sphere of mental world records. In 1991 at the first World Championship for Memory Skills, the newly-crowned World Champion Dominic O’Brien accurately memorised a shuffled pack of cards in just five minutes. At the...