A 19-year-old man was killed after climbing into a lioness' enclosure at a Brazilian zoo on Sunday, in plain view of zoo visitors. Authorities in Joao Pessoa, a coastal city in the country's northeast ...

In the wide-open savannas of sub-Saharan Africa, lions and hyenas are rarely far from each other. They share much of the same territory, hunt the same prey, and seem to constantly be sizing each other ...