Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
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
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12