There is tragic evidence to show that the paintings at the French prehistoric art sites are deteriorating.

When my father arrived in Kenya, he had found the Kikuyu way of life similar to that of the British at the time the Romans invaded England 2,000 years ago.

I put a bullet into the back of the crocodiles neck just behind the head, thus killing it. If a crocodile is hit in any other part of its anatomy it disappears into the water and is irrecoverable.

Most Kikuyu marriages were arranged on the basis of what is described by anthropologists as the bride price.

The trip I made to Angola to study the prehistoric contents of the gravel beds as a means of deciding the age of the deposits and their economic potential was the first time prehistory had ever been used for such a purpose.

The Dalmatian breed of dog has many primitive characteristics.

Raising funds for my fourth expedition proved to be very difficult.