Darwin himself realized that any kind of significant saltational change would imply a miracle-like intelligent intervention.
In evolutionary biology, the great transitions from one habitat to a totally different way of life have long proved to be the stuff of good storytelling.
In 2001, French scientist Alain Beauvilain and three Chadian colleagues discovered a fossil cranium in the dunes of the Chadian Sahara Desert.
For the established scientific consensus on human evolution, 2017 was a genuine annus horribilis.
I hardly dared to dream that, as an early Christmas present, 2017 would close with a final blow to the Out of Africa story.