To have arrived on this earth as a product of a biological accident, only to depart through human arrogance, would be the ultimate irony.

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

Primates need good nutrition, to begin with. Not only fruits and plants, but insects as well.

It occurred to me that if I did not handle the crash correctly, there would be no survivors.

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.

Along the borders to Ethiopia and Somalia, anarchy reigns, the police and military have retreated quite some distance.

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.