Nancy Cartwright believes it is a myth that science is on its way to furnishing us with a theory of everything. Jonathan Walmsley talked to her about how her ideas have developed and about her new book “The Dappled World”.
The possibility of time travel has always intrigued us, and advances in modern physics seem to have added a scientific credibility to the idea. But one consequence of time travel has generated a number of paradoxes that seem to make it impossible: meeting yourself. Michael LaBossiere tries to unravel some of the difficulties.