One 75-watt bulb gives more light than three 25-watt bulbs.
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A single speck of dust is half way in size between a subatomic particle and the Earth.
15
According to studies, men change their minds two to three times more often than women.
72
One cubic foot of gold weighs more than 1,200 pounds!
78
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21