The zoo said Kibo’s health had been declining over the past several weeks, so officials decided to humanely euthanize him.

"If one piece is removed, the entire system falls." Trail camera captures footage of unusual behavior from rare predator: 'It ...

Mary Jo DiLonardo has worked in print, online, and broadcast journalism for 25 years and covers nature, health, science, and animals. Popular and distinctive, known for their kitten-like faces and ...