One cubic foot of gold weighs more than 1,200 pounds!
78
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
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
Sound at the right vibration can bore holes through a solid object.
134
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
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9