Pigs can be trained to play video games with their snouts.
Human drugs often end up washing from sewers into rivers, which can alter animals' natural behaviours.
In 2011, scientists discovered that the rats lace their fur with a deadly poison.
Escobar's pet hippos were left behind when his private zoo closed, and they've flourished in the decades after his death.
Rabbit Hash, Kentucky, has a peculiar tradition of electing canine candidates.
The grizzly bears' strategy could help prevent muscle atrophy in humans as well.
The Swiss say it's cruel and lobsters can sense pain.
Octopuses can sometimes suffer from autophagy, or self-cannibalism.
The nymphs, called spittlebugs, make the foam, although it isn't actually spittle.
Cuba's extinct giant owl, Ornimegalonyx, was the largest owl that ever lived.
It took 48 different pigs to play the role of babe.
Coming in many shapes, colors, and sizes, strange mouth markings might aid in chick survival.
It goes against what we think mammals should be able to do.
It's a known fact that lobsters fall in love and mate for life.
Yoshi is a loggerhead turtle who was released off the Cape Town coast in 2017.
Once mating season is over, the Parks said the snakes should go their separate ways. 
Rare mutation on an octopus that causes its tentacles to branch.
Meet the tongue-eating isopod, Cymothoa exigua. This marine parasite feasts on a fish's tongue and then becomes its tongue.
Bees make bee glue (propolis) by mixing saliva and beeswax with tree sap or similar.
Giant panda babies are born weirdly tiny and underdeveloped.