Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
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
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
One barrel of petroleum holds 42 gallons.
20
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
The storage capacity of human brain exceeds 4 Terrabytes.
140
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