Life, the multiverse and everything

“I SEEM to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.” Those words, ascribed to Sir Isaac Newton, might still be spoken, with the appropriate correction for sex, by any scientist today.The discipline of natural science that Newton helped found in the second half of the 17th century has extended humanity’s horizons to a degree he could scarcely have envisaged. Newton lived in a world that thought itself 6,000 years old, knew nothing of chemical elements or disease-causing microbes, believed living creatures could spring spontaneously from mud, hay or dirty bed-linen, and had only just stopped assuming that the sun (and everything else in the universe) revolved around the Earth.