One litter of kittens can be produced by more than one father.
57
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
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
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25