A shrimp's heart is in its head.
32
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Squirrels forget where they hide about half of their nuts.
698
Cats and dogs can hear ultrasound.
350
All the pet hamsters in the world are descended from a single wild golden Hamster found in Syria in 1930!
34
No one has ever been able to domesticate the African elephant. Only the Indian elephant can be trained by man.
39