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
Pollen never deteriorates. It is one of the few natural substances that lasts indefinitely.
58
Passengers on the Beijing subway can pay with plastic bottles.
29
The small pocket in the larger pocket of your jeans was designed for pocket watches.
11
There are 2,500,000 rivets in the Eiffel Tower.
98
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
Contrary to popular belief, hair does not grow back darker and thicker after it has been shaved.
71
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19