The seahorse is the only fish to have a neck.
12
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
Cats recognise the voice of their owner, but never evolved to care.
22
Alligators can live up to 100 years.
337
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
A giraffe's kick is so powerful that it can decapitate a lion.
216
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23