Artful Dodger: Ok... it is a fact that we are an adaptive species.. skin colour being one, hence as man left Africa and travelled far away our skin change to match our surroundings. It is a fact that during ice ages man did travel to escape (survival technique) and hence grew stronger. Man then as such became a stronger more adaptable race, hence our ability to travel to the four corners of the earth. The way Africa's climate changed, led to man moving.

........ An opinion based on what has learnt as being held as historic fact from findings by geologists is fine. But to distort the significance of the event on human existence by taking that many humans died during the ice ages as a decline, rather than a time of hardening and strengthening as nature doth provide from time to time. The dinosaurs opened up the way for mammals, yet at cost of much of life on Earth. But some survived.

For example... the humble hedgehog here has been in decline, but now.. they are learning not to crawl into a ball when on a road. Hence those hedgehogs that do not, and instead run are transferring that trait unto their descendants and the population is now on the increase.

Do you see the basis for my opinion now??