At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Sound travels about 4 times faster in water than in air.
408
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
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
For every gallon of sea water, you get more than a quarter pound of salt.
45
The bark of an older redwood tree is fireproof.
65
4.5 pounds of sunlight strike the Earth each day.
27