Cats and dogs can hear ultrasound.
350
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
When cats are happy, they may squeeze their eyes shut.
10
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255