The slaughtered tigers were not bred in zoos, yet their story should put captive breeding in general into question.
Data collected by zoos can help scientists model the populations of endangered species.
Here's some advice on taking selfies with wild animals: don't. It's not fun for the animal, and can have serious knock-on effects for their health. And you could be injured (or worse).
Ceredigion County Council in Wales claims it had no choice. What do the experts say?
From collecting bugs to using math apps, there are many ways parents can engage in STEM activities with their kids to support their learning.
Zoos have come along way from their menagerie past. But society is increasingly demanding they become agents of conservation rather than entertainment.
Captivity isn't kind to cheetahs where most develop diseases that are unusual in big cats. It's never been clear why this is the case, but understanding their metabolism might provide the answer.
Zoos' role in conservation is divisive, but in Australia they could be critical in securing and even recovering threatened species.
Animal welfare depends on quality of territory not quantity.
It's not all about the gym and your diet. The places where we live and work shape our health, too.
Organised crime always looks for new ways to make money. And zoo animals are an easy target.
If zoo data was 'open access' we could identify the worst before too many animals die.
With circuses on the wane, are our attitudes towards animals improving?
Good zoos should be treated like they treat their animals. That means not beating them over the odd mishap.
More than 50 animals in a Venezuelan zoo have reportedly died from starvation in the past few months.
Domestic cats often travel hundreds of miles to their former homes – so why not an escaped lynx?
We tend instinctively to value human lives over non-human ones. But is there a point where the scales might tip the other way?
The shooting death of Harambe the gorilla has once again raised concern for the well-being of zoo animals. But animals in zoos may be fated by the very institution we have created to protect them.
The death of Harambe the gorilla has sparked outrage and raised questions over the adequacy of zoos, but protecting some animals through legal personhood is flawed and dangerous, says legal scholar.
The best modern zoos focus on conservation, education and research – not entertainment.