A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The average temperature at 40,000 feet above sea level is -60 F.
56
One cubic foot of gold weighs more than 1,200 pounds!
78
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15
Most dust particles in your house come from dead skin.
48