A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
The search engine Google got its name from the word 'googol', which refers to the number one with a hundred zeros after it.
56
The streets of Victor, Colorado, once a gold rush town, are paved with low-grade gold.
78
20252 is Smokey the Bear's own zip code.
35
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
Oak trees can live 200 or more years.
61
