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Why did pirates wear eye patches?

The eyes adjust quickly when moving from darkness to light; but when going from light into darkness, certain photo pigments need to be regenerated. This process can take as much as 25 minutes when adjusting from bright daylight on deck to pitch-black dark in the hold. In the 20th century, this principle was applied when military pilots began wearing a type of eye patch in certain circumstances to protect themselves from temporary or permanent blindness caused by nuclear flashes.

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What were the key dates of World War I?

Soon after the U.K. declared war on Germany, Austria-Hungary declared war on Russia, and Serbia declared war on Germany on Aug. 6. Later that month on Aug. 19, the U.S. announced their intention of remaining neutral, which would last until April 6, 1917 when the U.S. declared war on Germany.\nThere were a few other key dates that year as well, such as: March 15, when Russia's Czar Nicholas II gave up his throne; Nov. 7, when the Bolsheviks overthrew the Russian government; and Dec. 17, when the peace accord between Russia and the Central Powers went into effect.\nDuring the following year..

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How did telecommunications originate?

Electrical telegraphs were able to manipulate electronic currents through wires connecting two devices at each end to produce signals that could be translated into messages. The most famous development in electrical telegraphs was Samuel Morse’s version of the system and the language called Morse code, which allowed messages to be sent one letter at a time and printed by the receiving device on a piece of paper. Telegraphs became widespread across the United States and Europe, and the first transoceanic telegraph line was successfully completed in 1866.\nAfter electrical telegraphs had been ..

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Who are the Founding Fathers?

All of the original 13 states sent delegates to the Constitutional Convention, with the exception of Rhode Island. These delegates are all considered to be Founding Fathers even if they did not sign the Constitution. The delegates by state were as follows:\nConnecticut\nWilliam Samuel Johnson\nRoger Sherman\nOliver Ellsworth\nDelaware\nGeorge Read\nGunning Bedford Jr.\nJohn Dickinson\nRichard Bassett\nJacob Broom\nGeorgia\nWilliam Few\nAbraham Baldwin\nWilliam Houston\nWilliam L. Pierce.\nMaryland\nJames McHenry\nDaniel of St. Thomas Jenifer\nDaniel Carroll\nLuther Martin\nJohn F. Mercer\nMass..

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What was the Gilded Age in history?

The Gilded Age in American history was a developmental period when the industry of agriculture was surpassed by technological innovation and expansion. Gold rushes in the middle and late 1850s brought Americans to the Western Frontier, which they began settling. As a result, railroad expansion soon followed.\nDuring this time, Andrew Carnegie and John Rockefeller became the captains of the steel and oil industries respectively. Because the rise of industry was relatively new, there were very few laws regulating business. As a result, corruption and power reigned in both the business and politi..

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What is the function of a ziggurat?

The basic structure of a ziggurat, according to Reference.com, is a pyramid-like tower that has a number of stories which can be ascended via a structure that winds around the outside of the tower. This winding staircase around the outside of the tower makes the ziggurat appear as though it is a series of terraces. These structures were built from stone that was quarried from the surrounding areas.\nLivius describes several ziggurats that are still standing today. The best preserved of these is located in what is now Khuzestan in Iran. Another is Etemenanki, found in Babylon. The name "Etemena..

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What caused the battle of Gettysburg?

On the first day of the battle, Confederate forces were situated north of the town of Gettysburg, and the Union forces approached from the south. The Union troops initially occupied positions north of the town, but fell back under an attack from a numerically superior force. They ended up taking positions around Cemetery Hill and Cemetery Ridge, where they were able to hold out until reinforcements arrived.\nOn the second day of fighting, Lee attempted to flank and envelop the Union position, but faulty intelligence led his forces to crash directly into Union troops that had redeployed to a mo..

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How did Cornelius Vanderbilt acquire his wealth?

Vanderbilt's first investment was a loan from his parents for $100, at the age of 16 in 1810, so he could buy a boat to transport people from Staten Island to Manhattan. Within a year, the tycoon repaid the loan and even shared a $1,000 profit with his parents.\nWhen the War of 1812 broke out, Vanderbilt won a government contract to transport people and supplies between forts along the coast. From 1814 to 1818, the tycoon's shipping line expanded with more schooners to transport goods from Charleston, S.C., up to New England.\nVanderbilt started other passenger lines, and his wealth ..

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What were some Edison inventions?

While it wasn't his first invention, the development of the phonograph is what made Edison a national figure. Previous inventions had allowed sound to be recorded as a visual representation of sound waves, but never before could a device both record and play back sound. Edison himself viewed it as more of a curiosity than a revolutionary development, and only began refining and developing the technology when other inventors introduced their own advancements to his designs.\nWhile Edison was a renowned inventor, the vast majority of his patents were new designs of existing concepts. One of..

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What kind of character traits did Harriet Tubman exhibit?

Born into slavery in 1820, Tubman worked both as a field laborer and a house servant. As a young girl, she sustained a head injury at the hands of an overseer when she attempted to protect another slave. This injury caused her to experience pain, seizures and vivid dreams throughout the rest of her life.\nShe married John Tubman, a free black man, but fears of being sold by her owner motivated her to escape. Leaving Maryland for Pennsylvania, she eventually returned to help family members and others escape to the North. This began her efforts as an Underground Railroad worker during which she ..

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