'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
255
An olive tree can live up to 1,500 years!
58
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
The first household refrigerators cost about $16,000, in today's money!
47
Déjà vu occurs when your brain tries to apply a memory of a past situation to your current one, fails, and makes you feel like it's happened.
12
The New York Stock Exchange started as a coffee shop!
99
The chances of making two holes-in-one in a round of golf are one in 67 million.
67
Daydreamers are better at solving complex problems.
28