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Who invented woodblock printing?

This technique was more widely used during the Tan Dynasty (618 to 907 A.D.) and gradually spread to Japan and other countries. Woodblock printing remained the most common East Asian printing method until the 19th century. For printing, the woodblock was prepared as a relief pattern. The areas to show in white were cut away, leaving the characters or image to show in black at the original surface level. A new block had to be carved for every page in a book. A single mistake meant re-carving the entire block. When Europeans use this technique to print images, it is called woodcut.

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Why was the wheel so important to Mesopotamia?

While the wheel allowed to Mesopotamians to create novel means of transportation, sledges were likely in use at the same time. While wheels are advantageous in certain scenarios, the simplicity and low cost of sledges meant that they remained in use long after wheeled methods were available; however, the development of chariots was a pivotal moment in the history of civilization.\nWheels were also used in a number of mechanical devices. One of the most popular devices that used one was the potter's wheel. These devices made it far easier to make pottery quickly, and they may have spawned ..

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How did Andrew Carnegie donate his money?

When Andrew Carnegie retired at the age of 66, he was the world's richest man. At the time, his net worth was estimated at about $480 million. Adjusted for inflation, that amount would be the modern day equivalent of about $310 billion. His fortune was so vast that, to this day, he is one of the 25 wealthiest people who ever lived. Carnegie believed very strongly in the value of education. One of his first donations was $10 million to begin a pension for teachers, and $125 million more for the development of education. Carnegie also remembered the generosity of a gentleman who had allowed..

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Why was the fall of the Bastille important to the French people?

There were very few prisoners actually housed in the Bastille at the time of the attack, but it was still a monumental moment. The citizens involved in the attack, and in the Revolution in general, saw the successful assault on the Bastille as a sign that their revolt and cry for change couldn't be stopped.The French people did not come out of the battle without losses, however. There were about 100 citizens killed and eight guards at the Bastille as well. The governor and his three sons were taken prisoner, and though there were negotiations with the governor, he and his sons were later ..

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Who invented the first airplane?

The first time a mechanical plane took flight, it was piloted by Orville Wright at an altitude of 10 feet. The plane went about 120 feet before landing. Several more trials took place the same day, and the brothers continued to develop the technology for several years. It wasn't until World War I that the U.S. government began to use airplanes widely. The first aerial victory was recorded in 1915. Air travel for the general population also did not become popular until well into the 1950s.

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Was mustard gas used in WWI?

Mustard gas and other chemical agents were used with devastating effects during World War I, resulting in casualties numbering around 100,000 and around a million injuries to civilians and soldiers. Mustard gas harmed the enemy both during and after the initial attack, because the gas lingered in the ground for weeks.

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What happened in the year 1215?

Prior to the signing of the Magna Carta, the king had supreme rule. He could make and change laws as he chose. When King John assumed the throne in 1199 after the death of Richard the Lionhearted, many considered him disrespectful of and abusive to the feudal system on which England's economy was based. He was also unpopular amongst landowners, because he taxed them heavily in order to fund his travels. King John was also not very popular with the church. He conflicted with the pope and used the church as a moneymaking tool. The Archbishop of Canterbury finally approached the landowners a..

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What have children invented?

Louis Braille, a young French boy, was accidentally blinded in one eye at age three, and a disease caused him to lose sight in the other eye at age five. Ten years later, Braille invented his own reading and writing language made of dots. The Braille system is now used around the world and has given blind people the gift of reading.\nIn 1930, 16-year-old George Nissen watched a traveling circus show and thought that it would be cool if performers could bounce back up in the air and continue their tricks. Four years later, while on the University of Iowa's gymnastics team, Nissen and his c..

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Why did Britain sell opium to China?

Goods such as porcelain, silk and tea drove Britain to trade with China. However, the Chinese had no interest in British manufactured goods and insisted on payment in silver. Because Britain had to buy silver from Europe and Mexico to finance its purchases of Chinese goods, the trade deficit became vast. Opium had been tolerated in China as a medicinal drug, but only in limited use. British opium was stronger than Chinese opium, and the Chinese began to smoke it instead of eating its resin, enhancing its effect. The Chinese government became alarmed as vast quantities of the drug began to be p..

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What is Ferdinand Magellan famous for?

Magellan set out from Spain in the year 1519 with the goal of finding a western route to the Spice Islands. During his trip, he discovered what is now known as the Strait of Magellan, which he passed through on his way to the Pacific. Though he was killed when his fleet landed on the Philippine island of Cenu in 1521, what was left of his expedition continued and eventually landed back in Spain in 1522. Of the five ships and 270 crew involved, only one ship and 18 crewmen survived.

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