Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
By raising your legs slowly and laying on your back, you can't sink in quicksand.
105
It takes 492 seconds for sunlight to reach the Earth!
44
The chills you sometimes feel when listening to music is called "musical frisson."
18
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Passengers on the Beijing subway can pay with plastic bottles.
29
There are more than 10 million bricks in the Empire State Building!
75
Approximately 60% of the water used by households during the summer is used for watering flowers and lawns.
79