The Royal Institution Annual Christmas Lectures to Young People by Professor Eric Laithwaite

Physics, chemistry, mathematics, engineering, philosophy - Life, have all run together to form one composite subject which is the way our future lies. We have even dared to contemplate reversed time and by means of the gyroscope to ask whether the Universe has a 'top' and a 'bottom'. The White Queen says to Alice: 'It's a poor sort of memory that only works backwards.'