Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
There are more than 10 million bricks in the Empire State Building!
75
An iceberg contains more heat than a lit match.
73
During his or her lifetime, the average human will grow 590 miles of hair.
69
Babies start dreaming even before they're born.
134
A pipe 2 feet in diameter will allow four times more fluid to pass through it than a pipe 1 foot in diameter.
20
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130