Bats sleep 18-20 hours per day.
5
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
Dolphins have names for one another.
18
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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