One 75-watt bulb gives more light than three 25-watt bulbs.
57
German chemists made a replica of a trophy the size of one molecule.
68
Most dust particles in your house are made from dead skin!
67
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Cold water weighs more than hot water.
93
Aluminum used to be more valuable than gold!
84