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Author Question: Since the 1970s, over a million immigrants ________ to the United States. A) have came B) had ... (Read 49 times) |
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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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The human body produces and destroys 15 million blood cells every second.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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There are 20 feet of blood vessels in each square inch of human skin.