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
Cats recognise the voice of their owner, but never evolved to care.
22
The seahorse is the only fish to have a neck.
12
Sharks, like other fish, have their reproductive organs in their chests.
248
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
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
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
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