One 75-watt bulb gives more light than three 25-watt bulbs.
57
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
4.5 pounds of sunlight strike the Earth each day.
27
A ball of glass will bounce higher than a ball made of rubber.
73
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116