Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
In Australia, there are spiders big enough to eat snakes.
20
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Cats and dogs can hear ultrasound.
350
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6