There are 20 feet of blood vessels in each square inch of human skin.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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The human body produces and destroys 15 million blood cells every second.
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Your heart beats over 36 million times a year.
Growth of a bacterial colony.
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Early growth of the common bean (Phaseolus vulgaris), a typical eudicot.