Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
'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 iceberg contains more heat than a lit match.
73
Pollen never deteriorates. It is one of the few natural substances that lasts indefinitely.
58
In many countries, urine was used as a detergent for washing.
17
The human eye blinks an average of 4,200,000 times a year.
233
Sunflowers can be used to clean up radioactive waste.
17
