One 75-watt bulb gives more light than three 25-watt bulbs.
57
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The average temperature at 40,000 feet above sea level is -60 F.
56
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
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
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310