Prominent ecologists are floating an audacious plan that sounds like a "Jumanji" sequel — transplant African wildlife to the Great Plains of North America.
Their radical proposal is being greeted with gasps and groans from other scientists and conservationists who recall previous efforts to relocate foreign species halfway around the world, often with disastrous results.
The authors contend it could help save Africa's poster species from extinction, where protection is spotty and habitat is vanishing.
They also believe the relocated animals could restore biodiversity on this continent to a condition closer to what nature was like before humans overran the landscape.
They suggest starting with zoo animals. The perimeters of newly created reserves would be fenced.
"We aren't backing a truck up to some dump site in the dark and turning loose a bunch of elephants," insisted Cornell University ecologist Harry W. Greene, one of the plan's authors.
While most modern African species never lived on the American prairie, the scientists believe that today's animals could duplicate the natural roles played by their departed, even larger cousins — mastodons, camels and saber-toothed cats — that roamed for more than 1 million years alongside antelope and bison.
Relocating large animals to vast ecological parks and private reserves over the next century would begin to restore the balance, they said, while offering new ecotourism opportunities to a withering region.