The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Out of all the senses, smell is most closely linked to memory.
146
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Aluminum used to be more valuable than gold!
84
One barrel of petroleum holds 42 gallons.
20