The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Jellyfish as a species are actually older than dinosaurs and sharks.
383
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
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Rattlesnake mating sessions have been known to last more than 22 hours.
232