The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
The average temperature at 40,000 feet above sea level is -60 F.
56
Pure water (H2O) does not conduct electricity on its own.
46
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
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
One barrel of petroleum holds 42 gallons.
20