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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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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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In 1864, the first barbiturate (barbituric acid) was synthesized.
![The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha](https://biology-forums.com/gallery/47/medium_262797_12_08_15_1_33_47_221751025.png)
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