In the area of species protection, we should concern ourselves with what is right as opposed to what might be easier, or popular in the short term.

Echoing the criticism made of his father's habilis skulls, he added that Lucy's skull was so incomplete that most of it was 'imagination made of plaster of Paris', thus making it impossible to draw any firm conclusion about what species she belonged to.

To me it's a question of being able to look backward and give the present a root... To give meaning to where we are today, we need to look at where we have come from.

I ... believe the study of human history remains important and should not be banned. We should ensure that any archaeological studies are conducted with sensitivity and respect. Reburying relics, in my view, does not help anyone go anywhere.

Climate change: We have never faced a more critical time on our planet

The greatest problem we face is the growing number of people living in poverty. The related sense of hopelessness has to be impacting on every part of environmental management.

It's the next annihilation of vast numbers of species. It is happening now, and we, the human race, are its cause