When cats are happy, they may squeeze their eyes shut.
10
Dolphins have names for one another.
18
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10