Dolphins have names for one another.
18
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
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
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
When cats are happy, they may squeeze their eyes shut.
10