Orangutans shed light on obesity in people

Orangutans in Borneo are one of the only documented species to gorge themselves with the goal of building fat deposits. Orangutans, in fact are possible the only other primate that actually stores fat deposits. They live in a difficult habit and take advantage of times when food is available and gorge themselves. This activity is beneficial for the orangutan but causes problems in humans.

http://www.reuters.com/article/2011/12/14/us-obesity-orangutans-idUSTRE7BD03A20111214