On the CBC's science show Quirks and Quarks host Bob McDonald talks to biologists about whether natural selection still shapes humanity, and to journalist Joel Garreau about whether we are now determining our own evolutionary future.

On the CBC's science show Quirks and Quarks host Bob McDonald talks to biologists about whether natural selection still shapes humanity, and to journalist Joel Garreau about whether we are now determining our own evolutionary future.

http://podcast.cbc.ca/mp3/quirks_20070106_1544.mp3