41
Iron weighs more after it rusts.
68
42
If the chemical sodium is dropped into water it will immediately and violently explode.
67
43
Most dust particles in your house are made from dead skin!
67
44
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
45
The bark of an older redwood tree is fireproof.
65
46
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
47
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
48
Indoor pollution is 10 times more toxic than outdoor pollution.
62
49
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
50
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
51
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
52
One 75-watt bulb gives more light than three 25-watt bulbs.
57
53
The average temperature at 40,000 feet above sea level is -60 F.
56
54
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
55
All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
51
56
One ragweed plant can release as many as one billion grains of pollen!
51
57
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
58
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
59
Most dust particles in your house come from dead skin.
48
