fossils

4/26/11: Sharon Levy, author of, discusses the different theories about the human role in the rapid extinction of ancient beasts and the role of humans in large-animal extinctions today.

Chris Organ, PhD, Harvard University Dept of Organismic and Evolutionary Biology, has been a leader in developing the techniques that reveal ancient genomes. In this presentation, ; Dr. Organ describes the genomic technique that has led to an understanding of how birds evolved from one line of dinosaurs.