The elephant brain weighs about 6,000g.
274
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Dolphins have names for one another.
18
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
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
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9