01:27
Harm Avoidance (Part Two)
Dean Hamer, Director of the Gene Structure and Regulation Unit at the National Cancer Institute, expands on his discussion of harm avoidance, which he explains refers to a group of personality traits that includes depression, anxiety, feeling bad ab...
04:40
Building Blocks: Origins of Life
There are many questions yet to be answered about how, why and where life on Earth began. There are those who believe that DNA protein-based life as we know it may have had its origins in the world of RNA.