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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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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Thyroid conditions may make getting pregnant impossible.
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The average adult has about 21 square feet of skin.
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In 1864, the first barbiturate (barbituric acid) was synthesized.