1955: Kiba, a South American puma sleeping in the front room of her master's home, while the family watches television.
1939: Habiba, a 10-year-old lion at Chessington Zoo in Surrey, relaxes while keeper Hans Brick manipulates its hind legs.
July 1943: British wartime prime minister Winston Churchill with his wife Clementine holding a lion cub during a trip to London Zoo.
December 1936: George 'Tornado' Smith cleaning the teeth of his pet lioness, Briton, at the Kursaal amusement park in Southend, Essex. Smith is a stunt motorcycle rider on the wall of death sideshow at the park and Briton features in his act, riding in a sidecar.
June 1956: A three-month-old tiger cub abandoned by her mother at birth tackles a bone at the London Zoo.
1930: A lion lies on a couch while his trainer kneels beside him.
July 1960: Frank Meakins weighs Doreen and Julie, twin tiger cubs, born at the Whipsnade Zoo, in May.
1940: Melvin Koaants cleaning the African Lion at Los Angeles Zoo.
June 1928: In the same cage, a lion and a tiger are outstaring each other.
For a weekly dose of animal-themed community challenges - Subscribe to our Newsletter!
Can't get enough of ICanHasCheezburger? Find us on Instagram!