From Kamesh Aiyer
Lisa Grossman describes a bouncing universe model that has been kicked around for some time with no theoretical support (26 October, p 10). However, it is reminiscent of the bouncing universe envisaged in James Blish’s collection of science fiction stories Cities in Flight, in which humans manage to survive the collapse and re-expansion to emerge intact in the new universe. Well done Blish.
Cambridge, Massachusetts, US
