Now if we want poets to interpret physical science as Milton and Shelley did (Shelley and Keats were the last English poets who were at all up-to-dat… - J.B.S. Haldane

The change from one stable equilibrium to the other may take place as the result of the isolation of a small unrepresentative group of the population, a temporary change in the environment which alters the relative viability of different types, or in several other ways...

At Oxford, the young Haldane was frequently asked whether he was related to the "famous John Scott Haldane", his father, and he would answer "That depends on whether you consider identity to be a relationship."

I have no doubt that in reality the future will be vastly more surprising than anything I can imagine. Now my own suspicion is that the Universe is not only queerer than we suppose, but queerer than we can suppose.