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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Variegated leaves caused by a mutation in cpDNA Variegated leaves caused by a mutation in cpDNA
Right foot from the plantar aspect Right foot from the plantar aspect
Dove's Foot Cranesbill Dove's Foot Cranesbill
Abnormalities Caused by Cardiac Pathology Abnormalities Caused by Cardiac Pathology
Negative reading oxygen sensor voltage can be caused by several problems. Negative reading oxygen sensor voltage can be caused by several problems.
Reclining hand to foot pose variation (sputa padangushtasana in hatha yoga), and elbow press to ... Reclining hand to foot pose variation (sputa padangushtasana in hatha yoga), and elbow press to ...
Video: Humerus Adduction Animation

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