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A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

A jawbone found in the mainland Jenolan Caves A jawbone found in the mainland Jenolan Caves
The first commercially successful typewriter, manufactured in quantity beginning in 1874, surely fue The first commercially successful typewriter, manufactured in quantity beginning in 1874, surely fue
Raphael's mural, The School of Athens, depicts the early Greek philosophers engaged in ... Raphael's mural, The School of Athens, depicts the early Greek philosophers engaged in ...
The effects of alcoholism on the body systems. The effects of alcoholism on the body systems.
Differences in the mitochondrial code and coding for the “21st and 22nd” amino acids Differences in the mitochondrial code and coding for the “21st and 22nd” amino acids
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Video: Steps of glucose catabolism

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