Thousands of wildebeest wind through the Masai Mara National Reserve in Kenya, Aug. 3, 2002. More than a million wildebeest annually cross the border between Tanzania and Kenya. (Pedro Ugarte/Getty Images)
Credit: Pedro Ugarte

Thousands of wildebeest wind through the Masai Mara National Reserve in Kenya, Aug. 3, 2002. More than a million wildebeest annually cross the border between Tanzania and Kenya. (Pedro Ugarte/Getty Images)
Credit: Pedro Ugarte
The Tanzanian government has plans to build a major highway that would cross Serengeti National Park, home to the world’s last great wildlife migration. (Jesse Dukes/GlobalPost)
In Serengeti National Park, a gravel road lets commercial trucks and buses pass through, but only during the daytime. (Jesse Dukes/GlobalPost)
Wildebeest at Massai Mara National park in western Kenya on Aug. 15, 2008. (Roberto Schmidt/Getty Images)
Wildebeest dash down an embankment of the Mara River in Massai Mara National park on Aug. 15, 2008. (Roberto Schmidt/Getty Images)
Wildebeest rush the waters of the Mara river during the annual wildebeest migration in western Kenya on Aug. 15, 2008. (Roberto Schmidt/Getty Images)
A Masai elder in southern Loliondo poses in front of the Great Rift Escarpment after hitching a ride to his village. (Jesse Dukes/GlobalPost)
A Land Cruiser crawls over a lava flow from Ol Donyo Lengai in northern Loliondo. The government plans to build bridges or blast cuts through these geological features. (Jesse Dukes/GlobalPost)
Tourists watch a herd of wildebeest run through a field during the annual wildebeest migration in Massai Mara National park in western Kenya on Aug. 15, 2008. (Roberto Schmidt/Getty Images)
Wildebeest cross the Mara River in western Kenya on Aug. 15, 2008. Wildebeest are constantly on the move in search of grass and water. (Roberto Schmidt/Getty Images)

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