From Geoff Harding, Sydney, Australia
You report on a study that predicts nearly all mammals will go extinct in 250 million years as continents recombine and the climate shifts (30 September, p 9).
However, I assume that the changes will occur so slowly as to allow considerable time for evolution. Humans may be long gone, but, as a last resort, many mammal species might adapt to spend a major part of their lives underground or in the oceans.
