Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
118
The words ‘racecar,’ ‘kayak’ and ‘level’ are the same whether
they are read left to right or right to left (palindromes).
they are read left to right or right to left (palindromes).
120
In zero gravity, a candle's flame is round and blue.
16
A dairy cow can produce more milk when listening to music.
446
Only 8% of the world’s currency is physical money. The rest exists only on computers.
20
The P.S. at the end of a letter stands for Post Script.
40
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75