Profiles with Dr. William Thierfelder

When we Homo sapiens made our first appearance on the African plains around three-hundred-thousand years ago, we were content to stay put.  We had plenty of food, we apparently mingled somewhat peacefully with other hominins like Homo erectus, and we enjoyed a fairly contented life. Around one-hundred-thousand years ago, things began to change. The climate began to shift, food supplies became more scarce and our numbers dwindled.  We began to trek out of our homelands in small clan groups into the Middle East, Europe, Asia and eventually the Americas. In this program, Dr. Thierfelder takes a look at that remarkable odyssey across the planet.