August 13, 2001

Privies might not seem like a good place to find clues about our past, but they're highly prized by archaeologists. Peter Bleed, an archaeologist at the University of Nebraska, talks with Todd about why that is, and what they find in the old outhouses. Controversy surrounds who's allowed to dig them, he says, and he explains why many sites are looted.

Research indicates that the median height for men and women has been about the same since 1960. Science editor Philip Yam talks about nutrition and growth, and how an improved diet in the mid-20th Century helped Americans reach their current average height. Yam is editor at "Scientific American".

Lev Raphael, our book reviewer, returns to discuss the recent work by David McCullough, called "John Adams". Raphael explains how this portrait of Adams is as thrilling as other works about him by Joseph Ellis. Raphael is book critic for "The Detroit Free Press".