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
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
The elephant brain weighs about 6,000g.
274
Cats recognise the voice of their owner, but never evolved to care.
22
Lurch, a Watusi bull, had the largest horns in the world.
32
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23