A date for your diary: Leonardo da Vinci predicted that the world would end on November 1, 4006, according to a Vatican researcher. Sabrina Sforza Galitzia said the clues were to be found in da Vinci’s Last Supper mural. The central half-moon window, or lunette, above his painting of Christ with his disciples before the Crucifixion contains a “mathematical and astrological” puzzle which she has deciphered, she said. She claimed to have worked out that da Vinci foresaw the end of the world in a “universal flood” which would begin on March 21, 4006 and end on November 1 the...