A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Dogs have been man's pet for over 14,000 years.
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Dolphins have names for one another.
18