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
Déjà vu occurs when your brain tries to apply a memory of a past situation to your current one, fails, and makes you feel like it's happened.
12
On average, the life span of an American dollar bill is eighteen months.
33
Not swinging your arms when you walk increases the effort of walking by 12%, the equivalent of walking 20% faster or carrying a 10 kg backpack.
12
30 years ago, you could buy a lifetime, unlimited first-class travel pass with American Airlines for $250,000.
14
The odds of being killed by falling out of bed are one in two million.
136
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
There's a company in China that allows you to hire someone to stand in line for you for $3-$5 an hour.
14