Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
The oldest recorded elephant lived for 82 years.
213
The cat brain weighs about 30g.
167
In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
22
Drivers kill more deer than hunters do.
660
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6