Penguins have a gland above their eye that turns saltwater into freshwater.
12
The P.S. at the end of a letter stands for Post Script.
40
Water is actually naturally blue.
48
Our brains have a negativity bias and will remember bad memories more than good ones.
15
Only about 2% of the world population has green eyes.
36
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Tigers can see 6 times better at night than humans.
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