Featured Documentary: Gender Puzzle

Are we on the cusp of discovering what determines gender? The old mantra - all girls have XX chromosomes and all boys have XY - is no longer reliable. Scientists are now looking beyond chromosomes to "brain sex" and the role of newly discovered genes. By studying transsexuals and people on the gender extremes, they believe they can unlock the gender puzzle. This high-quality documentary looks at the new and challenging science of gender.