Einstein, Santa Claus, and Relativity.
Mysteries of Father Christmas/Santa Claus 'solved' by relativity theory The mystery of how Father Christmas (Santa Claus) can deliver presents to 700 million children in one night, fit down the chimney and arrive without being seen or heard has been 'solved' by a physicist at the University of Exeter. Santa and his reindeer zoom around the world at such speed that -- according to relativity theory -- they would shrink, enabling Father Christmas and a huge sack of presents to fit down chimneys. Dr Katy Sheen, a physicist in the Geography department at the University of Exeter, has also found a scientific explanation for why Santa is not heard arriving by children, and why they rarely catch a glimpse of him on Christmas eve. Santa and Special Relativity She recently explained to children at the University of Exeter that Santa's stealth delivery is partly explained by special relativity theory devised by Albert Einstein, whom Dr Sheen thinks bares a pass