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[http://www.scotese.com/cretaceo.htm Christopher Scotese's reconstruction of the continental arrangement 94 million years ago]. The land bridge between North America and Asia is indicated at the upper left. The connection between North and South America is also visible. Africa is drifting away from other southern continents, but Australia, Antarctica and South America are linked. Africa split off from this southern supercontinent beginning around 140 million years ago.