Animals Humour. pic: 1969. "Noelle" a pregnant mountain gorilla pictured at Chester Zoo, seemingly deep in thought. [Getty Images]

Animals, Humour, pic: 1969, "Noelle" a pregnant mountain gorilla pictured at Chester Zoo, seemingly deep in thought (Photo by Bentley Archive/Popperfoto via Getty Images/Getty Images) — see more

Animals, Humour, pic: 1969, "Noelle" a pregnant mountain gorilla pictured at Chester Zoo, seemingly deep in thought (Photo by Bentley Archive/Popperfoto via Getty Images/Getty Images)

Popperfoto Bentley Archive/Popperfoto