From Sepehr Ehsani
In reviewing Brian Clegg’s book How to Build a Time Machine Manjit Kumar discusses the theoretical limitations of time travel (10 December 2011, p 52). Clegg ponders the absence of time-travelling guests at an event they were invited to in 2005; this may be a harbinger of our own fate.
We have developed unprecedented means of self-destruction, and maybe our species does not survive long enough to develop time travel technology. A sobering thought.
Toronto, Canada
