The Han dynasty lasted from 206 BC-220 AD and had many amazing achievements that changed the world for all and benefits our society in many ways. The Han dynasty had many achievements in science, and one of them was the seismograph. The Seismograph was an impressive instrument because it detected earthquakes from hundreds of miles away. Another scientific achievement was that they learned how to predict when the sun was going to have an eclipse. This discovery helped people because they were always ready when an eclipse came. In medicine, doctors found new kinds of medications. This helped doctors treat more diseases and patients who were ill. Han craft workers also made an amazing invention when they learned how to create paper. They created paper by pounding the bark of Mulberry trees. The invention of paper had a huge effect on the way people lived. Paper made it easier to record what was happening. With paper, students invented the first Chinese dictionary. Another idea that came up under the rule of emperor Wudi was Grand School. Grand School were schools that were created to help students get jobs in the local government. Grand School was the empire’s best school. They were set up in every province or state in the empire. Without Grand School and the Confucian emphasis on education, their society might not have had innovators to create these inventions. Overall, thanks to the Han dynasty’s hard work and achievements, society obtained tools and scientific advancements that benefit us to this day.