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 Episodeunavailabledisabledshowfalse14532Giraffe Road Trip A rare giraffe species takes a road trip to the other side of the Nile River. 2016-10-26 20:00:00http://www.pbs.org/wnet/nature/files/2016/09/mezzanine_297-480x270.jpg2365852851cove14521Hummingbirds Battle in the Air Hummingbirds may look cute, but they hide a secret warrior within. 2016-10-12 20:00:00http://www.pbs.org/wnet/nature/files/2016/09/mezzanine_329-480x270.jpg2365850693cove