Gunpowder originally came from from the Chinese, who really used it to make fireworks.  Eventully the Europeans starting using it for killing people. They started using gunpowder in wars in the middle of the fourteenth century, at almost exactly the same time as the Black Death showed up. Gunpowder tend to blow up in one’s hands for and they werent smart enough to develop pistols, but they had cannons, that were very thick to keep them from blowing up. This called for changes to medieval life. Soliders didnt need to train for years in order to be useful at battle. At first gunpowder was mostly used to scare the enemy soldiers due to its uslessness because they didnt know it was effective and then they realized that it was usefull for killing.During the Middle Ages, people used either water clocks, sun dials, or candle clocks to tell time, but none of those could tell time to the exact minute. The best clocks told time to the quarter hour, it wasn’t until the later improvement of the mechanical clocks that people could tell time to the minute. Jost Burgieven is named an inventor for the minute hand in 1577. But it still took over 100 years till the minute hand wasn’t added to clocks until 1680. For most of the Middle Ages, the time between sunrise and sunset was divided into twelve seperate hours just like it was in ancient Rome and how it is now. Silk was the most fanciest fabric available to medieval upperclasses and they were the only ones that cost afford the product. Silk was an important part of the chinese economy, villages in China would help to make silk, and they could live off the money they got for making it for the entire year. Eventually, the secret to make silk was leaked out of China. By the second century, silk was being made in India, then Japan learned the secrect and started to make it. Then, the middle east found out the secret and started to make it. People back then couldnt figure how the craftsmen knew how to dye and weave the silk, but not know how to physically make the silk. Medieval glasses didn’t have the arms to go over the ears when they were used back then. This meant that the people that had to wear them, they would either have to hold them while using them, or pinch them onto their noses to keep them in place to not fall. They werent comfortable but they had to deal with it. As time passed, glasses-makers became so hardworking and knowledgeable about the glasses that the Duke of Milan, one of the few that were very smart with glasses to order 200 pairs in 1466, all of different strengths. He said that he wanted the strength of the lenses to go up or down based on the persons eyesight.