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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Vaccines prevent between 2.5 and 4 million deaths every year.
Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.
Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.