There are approximately three chickens for every human on Earth.
13
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18
Dogs sometimes fake being sick to get attention.
26
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Bats sleep 18-20 hours per day.
5
There's a rare breed of pig that looks like a sheep.
14