Featured in captive breeding
Zoos and aquariums have seen a dramatic shift—to the benefit of wildlife
Here are some of the animal welfare and conservation standards they have to follow.
Does South Africa still need private rhino breeders to fight poaching?
John Hume might be keeping up to 13 percent of the world's white rhinos on his ranch. Not everyone thinks that's a good idea.
Did a high sex drive really save the giant tortoise from extinction?
The great Diego fathered more than 800 offspring. That doesn’t mean he’s any hornier than other tortoises.