4.5 pounds of sunlight strike the Earth each day.
27
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 bark of an older redwood tree is fireproof.
65
Sound travels fifteen times faster through steel than through air.
134
Pumice is the only rock that floats on water.
14
Balsa wood is classified as a hard wood!
41
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21