Americas.

As early humans spread out across the world, their toughest challenge was colonizing the Americas because a huge ice sheet blocked the route. It has long been thought that the pioneers, known as Clovis people, arrived about 13,000 years ago, but an underwater discovery in Mexico suggests people ar...

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Bibliographic Details

Format:	Video
Language:	English
Language Notes:	In English
Published:	[San Francisco, California, USA] : PBS, 2015. Kanopy Streaming, 2018.
Subjects:	Biology. Documentary-style films. Documentary films. Science. Internet videos.
Online Access:	Connect to this streaming video