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
Caffeine boosts memory.
405
At 90 degrees below zero, your breath will freeze in mid-air and fall to the ground.
25
Babies are born without knee caps.
78
Teddy bears were named after U.S. President Theodore 'Teddy' Roosevelt.
23
An Australian study found that homework is of little to no academic value to students in elementary and junior high schools.
32
Each year, more than 50,000 people are injured by jewelry in the U.S.
29
Your fingernails grow faster in summer.
744