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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.
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
![An oscillating needle 1 or 2 inches Hg below normal could indicate an incorrect air–fuel mixture ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_15_51_29687328.png)
![If the needle drops 1 or 2 inches Hg from the normal reading, one of the engine valves is burned or ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_21_49_29689762.png)