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Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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The average office desk has 400 times more bacteria on it than a toilet.

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Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

An otoscope, used to visually examine the external auditory ear canal and tympanic membrane. An otoscope, used to visually examine the external auditory ear canal and tympanic membrane.
Internal female reproductive organs. Internal female reproductive organs.
External ear External ear
Internal Anatomy of the Spinal Cord Internal Anatomy of the Spinal Cord
The body’s survival depends on mechanisms that maintain internal homeostasis The body’s survival depends on mechanisms that maintain internal homeostasis
Video: Homeostasis (range of body conditions, normal limits, mild stresses & severe stresses)

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