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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

Factors influencing character of respirations Factors influencing character of respirations
Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many
Testcross of a single character Testcross of a single character
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Video: Types of energy transfer reactions: oxidation-reduction reactions and ATP generation reactions

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