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Author Question: For the Aztecs and Maya, obsidian was: a. extracted from deep mining pits b. easy to work with ... (Read 105 times) |
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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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The average adult has about 21 square feet of skin.
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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.