The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5
Bats sleep 18-20 hours per day.
5
Dolphins have names for one another.
18