Animal Testing : Why ? Human Testing: Why Not ?

In a laboratory at the Wisconsin National Primate Research Center, rhesus monkeys are tested for the propostion that calorie-restricted diets lead to longer lives. Rhesus monkeys have already existed on this planet longer than homo sapiens. Rhesus monkeys are not found in their native habitat either obese or dying prematurely from weight-related diseases like diabetes.

On the other hand, tens of millions humans around the "civilized world" are dying prematurely because of eating too many calories. Why are we using the hapless rhesus monkeys for these experiments? We should be using humans. The humans could still watch their TV. They would be tested in comfortable environments and get paid to do what they do now for nothing. But the poor rhesus monkeys could be left in their forests and jungles and enjoy their succesful genetics. As long as the the human doesn't fell the forest to meet the demands of it's increasingly unsuccessful lifestle.