The cat brain weighs about 30g.
167
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
There are approximately three chickens for every human on Earth.
13
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
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
Nicole Kidman is scared of butterflies.
65