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
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Cats and dogs can hear ultrasound.
350