Secrets of the Tribe Documents the conflicts between cultural and evolutionary anthropologists who have studied the Yanomamo tribes.

He meets linguistics professors, evolutionary anthropologists, monkeys, parrots, those deaf people, speakers of Klingon, more children.

To some evolutionary anthropologists, it's only natural that women would show less interest in sports.

But Dr. Robert Foley, an evolutionary anthropologist at the University of Cambridge in England, thinks a lot can be learned from ape sociality about the evolution of human social institutions.

One researcher, Dr. Wenda Trevathan, an evolutionary anthropologist at New Mexico State University, even argues that the pain and anxiety surrounding human birth serve a lifesaving purpose.

An evolutionary anthropologist discusses how the physical differences between men and women will work to the advantage of women in the next century.

"It's the first study of ancient DNA that looks at phenotype," says Svante Pääbo, an evolutionary anthropologist at the Max Planck Institute in Leipzig, Germany.

Robert Sussman, an evolutionary anthropologist and the editor in-chief of American Anthropologist, explained why the journal did not accept ads for Rushton's 1998 book:

"I suspect that our social behavior evolves rapidly but that much of it changes direction over time," said Dr. Henry C. Harpending, an evolutionary anthropologist at the University of Utah.

"There are a whole bunch of people who think it's dehumanizing to talk about humans in biological terms," said Dr. Robert Boyd, an evolutionary anthropologist at the University of California at Los Angeles.