The largest breed of rabbit is the Flemish Giant.
65
Denmark has twice as many pigs as there are people.
66
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
Sheep, goats, octopuses, and toads have rectangular pupils.
7
The colossal squid has the largest eyes in the world.
4