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
Early American humans hunted car-size armadillos and used their shells for houses.
12
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492