Scientists in Germany have developed a candy that doesn't cause cavities.
11
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The bark of an older redwood tree is fireproof.
65
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18