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
The Basenji dog is the only dog that is not able to bark.
4
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Only 3% of bird species have penises.
0