- The hydrochloric acid found in your stomach is strong enough to dissolve a nail.
- October the 10th is national metric day.
- There is no proof as to who built the Taj Mahal.
- There are over 97,000 km (60,000 miles) of blood vessels in the average person.
- The ancient Greeks first grew carrots as a form of medicine and not a food.
- Female condors lays a single egg once every 2 years.
- Babylonians measured the circumference of a circle as approximately 3 times the diameter, which is fairly close to today's measurement which uses the value of Pi (around 3.14).
- The longest time a person has been in a coma is 37 years.
- Opposite faces of dice always add up to 7.
- The praying mantis can turn its head 180 degrees.
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