Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
The elephant brain weighs about 6,000g.
274
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
The elephant shrew’s closest relative isn’t a shrew — it’s actually an elephant
9
Sharks, like other fish, have their reproductive organs in their chests.
248
Penguins have a gland above their eye that turns saltwater into freshwater.
12