It will be a vast boon to mankind when we learn to prophesy the precise dates when cycles of various kinds will reach definite stages.
Ellsworth HuntingtonWith every throb of the climatic pulse which we have felt in Central Asia,, the centre of civilisation has moved this way and that. Each throb has sent pain and decay to the lands whose day was done, life and vigour to those whose day was yet to be.
Ellsworth Huntington