About 8,000 years ago, the relationship between cows and man began with the revolutionary advent of domestication in Mesopotamia, the Indus River Valley, and Africa. Discover how cows have altered human life, human biology, and the geography of the world.
expiredpublic1414995219004cove1414 Full Episodeunavailabledisabledshowfalse15056Dolphins Behaving Badly Dolphin teenagers are the worst! 2017-02-22 20:00:00http://www.pbs.org/wnet/nature/files/2017/02/mezzanine_961-480x270.jpg2365960595cove15053Skua Steals 'Spy Egg'Get an 'eggs-eye' view of a robbery in progress. 2017-02-22 20:00:00http://www.pbs.org/wnet/nature/files/2017/02/mezzanine_508-480x270.jpg 2365960591cove