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

Elephants can live to an age of up to 70 or 80 years and they have a good memory. It could be they come across an area that is experiencing a drought. Then they continue on their path and run into people.

For fossils to thrive, certain favorable circumstances are required. First of all, of course, remnants of life have to be there. These then need to be washed over with water as soon as possible, so that the bones are covered with a layer of sediment.

We are concerned that, in a few years time, this place of discovery, with its wealth of human fossils, the like of which can be found nowhere else in the world, could be completely destroyed.

I can't think of any other region in the world which is such a vast source of fossils.

To investigate the history of man's development, the most important finds are, of course, hominid fossils.