From David Seager, Edinburgh, UK
The aftermath of the extinction of Homo sapiens has been alluded to recently in letters, most recently suggesting that a new species will evolve with intelligence like ours (Letters, 29 May).
My understanding of Charles Darwin’s theory has been that there is no certainty that our intelligence will be replicated. However, having now read the fascinating , I realise that I may be wrong. I wonder whether a new species with the intelligence of H. sapiens is more probable than one with the strength of Tyrannosaurus rex.
