- The blue whale’s tongue weighs as much as an adult elephant.
- Houseflies hum in the key of F.
- The flamingo can only eat when its head is upside-down.
- One species of jellyfish can revert back to it's child stage after becoming mature, effectively making it immortal.
- Only half of a dolphin's brain sleeps at a time. The other half makes sure it comes up for air so it doesn't drown.
- A snail can sleep for 3 years at a time.
- A newborn Chinese water deer is so small it can almost be held in the palm of the hand.
- This is what scorpions look like under ultraviolet light:
- Once a giant clam picks a spot to live on a reef, it does not move for the rest of its life.
- The kick of an ostrich is used as a weapon and is capable of killing a lion — and yes, humans too.
- Goats and sheep have rectangular pupils which allow them to see nearly 360 degrees around themselves.
- No two tigers have the exact same stripes.
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