- Squirrels can climb trees faster than they can run on the ground.
- The teeth of a viperfish are so sharp and long that if it closed its mouth with the teeth inside, it would pierce its brain.
- Phantom rain are raindrops that never reach the ground.
- Humans are the only primates that don't have pigment in the palms of their hands.
- Roosters can't crow if they can't fully extend their necks.
- Men have 10% more red blood cells than women.
- A rainbow can only be seen in the morning or late afternoon.
- The average human brain contains around 78% water.
- Different names for the number 0 include zero, nought, naught, nil, zilch and zip.
- Sailors once thought wearing gold earrings improved eyesight.
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