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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

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Women are 50% to 75% more likely than men to experience an adverse drug reaction.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

The chromosomal basis of allele segregation. The chromosomal basis of allele segregation.
Segregation according to resource factor among 40 species of British passerine birds. Segregation according to resource factor among 40 species of British passerine birds.
This lithograph of the New York draft riots, 1863, shows that although the rioters mainly targeted b This lithograph of the New York draft riots, 1863, shows that although the rioters mainly targeted b
Angry jeers from whites rain down on Elizabeth Eckford, one of the first African American students ... Angry jeers from whites rain down on Elizabeth Eckford, one of the first African American students ...
Whites pour mustard and ketchup over black (and white) students who were integrating a lunch counter ... Whites pour mustard and ketchup over black (and white) students who were integrating a lunch counter ...
Violence and Segregation in Watts, Los Angeles, August 11, 1965 Violence and Segregation in Watts, Los Angeles, August 11, 1965
Video: Wound Repair Animation

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