'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
The worlds oldest piece of chewing gum is over 9000 years old!
122
Pollen can travel up to 500 miles in a day.
40
Real diamonds do not show up on x-ray.
36
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
The glue on Israeli stamps is certified kosher.
67
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
There is one slot machine in Las Vegas for every eight inhabitants.
58