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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.