Two animals born at the Cheyenne Mountain Zoo in Colorado Springs were euthanized earlier this month due to age-related ...

A juvenile mountain gorilla in Virunga National Park. Neil Ever Osborne Far left, a silverback in Volcanoes National Park. A male mountain gorilla, weighing up to 480 pounds, is far more powerful ...

We then watch Mesou, a 44-year-old gorilla, taking the afternoon sun ... spinal arthritis and her fur is gray, not like the male silverback's fur, but gray all over. "See, she doesn't have ...