Passengers on the Beijing subway can pay with plastic bottles.
29
Sudbury Valley School allows students to do whatever they want; no curriculum, tests, homework, or even classes unless requested. 82% of students get accepted to college, as opposed to the 63% national public school average.
21
When Heinz ketchup leaves the bottle, it travels at a rate of 25 miles per year.
127
The first household refrigerators cost about $16,000, in today's money!
47
There are more than 10 million bricks in the Empire State Building!
75
At 90 degrees below zero, your breath will freeze in mid-air and fall to the ground.
24
