Ice isn't slippery. What makes people and things slip on ice is water. A thin layer of ice melts when pressure is applied to it and it is this wet layer on top of the ice that is slippery.
153
On average, every dollar bill you touch has over 3,000 different types of bacteria.
8
There is one slot machine in Las Vegas for every eight inhabitants.
58
Only humans shed emotional tears.
331
NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
The hole in the soda can tab is actually used to hold a straw in place and stop it from rising.
27
Stilts were invented by French shepherds who needed a way to get around in wet marshes.
45
Oak trees can live 200 or more years.
61