One litter of kittens can be produced by more than one father.
57
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Dolphins have names for one another.
18
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26