Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Tigers can see 6 times better at night than humans.
305
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217