Kevin Richardson, the Lion Whisperer, takes Kahn the Black Leopard for an enrichment walk.

Kevin Richardson, the Lion Whisperer, herds Thor's Pride of 6 lions back into their camp after an enrichment walk.

A 19-year-old man was mauled to death after climbing into a lion enclosure Sunday morning in Brazil. Viral video captured the incident, showing the victim scaling a roughly 26-foot-tall fence to enter ...

A man who climbed over 18 feet to enter a lion's enclosure was fatally attacked in front of horrified zoo visitors. Gerson de Melo Machado, 19, was mauled to death after he invaded a lioness' ...

A Brazilian teenager was mauled by a lioness in full view of zoo visitors on Sunday, after scaling a six-meter wall and safety fencing and shimmying down a tree into the enclosure, authorities said.