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Map Dividing Link Mexico & Central America 2007 National Geographic
Map Dividing Link Mexico & Central America 2007 National Geographic
When the sweeping tail of the North American continent became a land bridge to South America three million years ago, it changed the world. An ocean that had once flowed freely was now divided into Atlantic and Pacific. Its effect on ocean currents influenced the world's climate and the land bridge became a biological connector as well when species that had developed in isolation began to travel between continents.
Measures approx 20 x 31 inches
Supplement to National Geographic August 2007
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