Dating back to the 1600's, thermometers were filled with Brandy instead of mercury.
16
Gardening is said to be one of the best exercises for maintaining healthy bones.
40
Human teeth are almost as hard as rocks!
47
More people have a phobia of frogs than rats.
41
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
Enamel is hardest substance in the human body.
61
The human body contains over a billion miles of DNA.
147
The chemicals indole and skatole, which help to account for the particular smell of human feces, are used as ingredients in perfume!
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