February 3, 2003

One of the most popular theories of the evolution of human beings is that we once were hunter-gatherers. Todd is joined by anthropologist James O'Connell, who who disagrees with this theory and believes that we were more likely scavengers. He also suggests that women were the primarily responsible for bringing meat to the family. O'Connell is an Anthropologist at the University of Utah.

A new study suggests that taking part in protests and demonstrations can be good for your physical and mental health. Psychologists at the University of Sussex found that people who get involved in campaigns, strikes and political demonstrations experience an improvement in psychological well-being that can help them overcome stress, pain, anxiety and depression. Todd talks with Psychologist John Drury about this research.

Scientists and theorists are often posing alternative theories to our history asserting that we cannot ever know about our past for certain. Todd is joined by author John Lewis Gaddis, who suggests that theory is incorrect. In his new book, "The Landscape of History: How Historians Map the Past", Gaddis implies our historical truths are the most successful in creating a widely accepted consensus of our past. Gaddis is a Professor of History at Yale University.

People begin to lose their balance in their old age just as their bones get more fragile. This often results in crippling or fatal falls. But research at the University of Boston shows that foot massages can help for those who have balance problems. Todd is joined by bioengineer James Collins, whose team has developed half-inch thick vibrating gel insoles designed to create surer footing.