The Great Rift Valley

THE GREAT RIFT VALLEY (Lebanon to Mozambique)

The Great Rift Valley is a 4,300-mile-long series of trenches that runs from Lebanon (in Asia) to Mozambique (in Africa). Tanzania's 30-mile-long Olduvai Gorge leading into the Rift is the site of some of the world's most important "early man" finds, associated with the team of Mary and Louis Leakey (prominent in the "National Geographic" when I was a kid).

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(Image courtesy Wikimedia Commons; CTTO)