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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

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Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Common Bluetail Damselfly Common Bluetail Damselfly
Several species of squirrels have melanistic phases. In large parts of United States and Canada, the Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
Common structure of nucleotides Common structure of nucleotides
A child suffering from malaria, one of the most common and deadly infectious diseases. A child suffering from malaria, one of the most common and deadly infectious diseases.
Common Blood Chemistry Tests Common Blood Chemistry Tests
Common Root Words and Combining Forms Common Root Words and Combining Forms
Video: Prone Position

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