ST. LOUIS - Getting older can be a burden. Just ask Enrique, an elderly penguin at the St. Louis Zoo who’s getting some relief from his arthritis after getting custom-designed boots.

Four young spider monkeys are now happily adjusting to life at the St. Louis Zoo after being taken from smugglers at the ...

Humboldt penguins, native to South America, are vulnerable to climate change and habitat loss, according to the zoo. Population numbers have decreased by around 85% in the last 40 years.