The challenge for individuals in primate societies is to be able to predict the behavior of others. One way would be for individuals to have a huge m… - Richard Leakey

If the molecular evidence is correct... almost five million years passed between the time our ancestors became bipedal and the time when they started making stone tools. Whatever the evolutionary force that produced a bipedal ape, it was not linked with the ability to make and use tools. However, many anthropologists believe that the advent of technology 2.5 million years ago did coincide with the beginnings of brain expansion.

Protecting elephants and conserving natural ecosystems remain my personal priorities. But I am not so sure this would be so were I ill, hungry, and living in dispair. ...We must somehow find a way to provide for our own species if we are also to preserve others.

Prehistoric images speak to us more evocatively than any other element of the archeological record: colorful, vibrant paintings of horses, of bison, of a panoply of animals and humans that often seem alive and in motion. And yet there is a dimension of unreality about them... The images seem plucked from life... often arranged chaotically to our eye, frequently superimposed... sometimes apparently incomplete. ...There is an enigma in these images, a profound challenge to our understanding of the past.