You can tape a small mirror onto a cone speaker, play music and shine a laser on to the mirror and the reflection will look like a laser light show on your wall.
102
On average, every dollar bill you touch has over 3,000 different types of bacteria.
8
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
It is impossible to hum if your nose is plugged.
366
Extremely high pressured water can easily cut through a steel beam.
51
In Tokyo, a bicycle is faster than a car for most trips of less than 50 minutes!
58