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
Sheep, goats, octopuses, and toads have rectangular pupils.
7
The elephant brain weighs about 6,000g.
274
In Australia, there are spiders big enough to eat snakes.
20
Condoms were originally made of animal intestines or linen.
347