Cats recognise the voice of their owner, but never evolved to care.
22
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
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
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
In 2005, in Africa, it was reported that three lions rescued a 12-year-old girl from kidnappers and guarded her for half a day until help came.
46