Some dog population genetics show similarities to ours, such as in the ability to digest grains. But other lineages differ. &nbsp;

Scientists Take a Cattle Head Count in India

Leading science journalists provide a daily minute commentary on some of the most interesting developments in the world of science. For a full-length, weekly podcast you can subscribe to Science Talk: The Podcast of Scientific American . To view all of our archived podcasts please go to www.scientificamerican.com/podcast