Today, I went to "Museum of Natural History". In there, we learned about the Solar System and the history of living things.

     At first, I saw the history of living things with Teacher David. I learned that in Precambrian Era, only the Cyanobacteria was living.They are cells that produce oxygen. Next was the Paleozoic Era, where reptiles, plants, and fish lived. The third era was the Mesozoic Era, the era that dinosaurs lived. As the time went by, the dinosaurs extincted, and the Cenozoic Era came. This was when human were created. I mostly learned about the dinosaurs, and the dinosaurs had three types. Carnivore, herbivore, and omnivore. The carnivores ate meat, and had sharp teeth. On the other side, the herbivores ate plants and had flat teeths. Omnivores ate both plants and meat. I also learned that Troodon was the smartest dinosaurs.

     Next, I learned about the Universe with Min-Sun teacher. I found out that the whole universe was created about 15 billion years ago during Big Bang. Then, about 4.6 billion years ago, the Earth was created. Also, the continents long before were connected as one, which was called Pangaea. I knew that the 8 planets were existing, but i never knew that sun was a fixed star. After that, I learned about the horoscope and the astronomical chart. In the back of ten thousand won bill, we can find the astronomical chart. It is made from Goguryeo and Joseon. The earth had an inner core, an outer core, mental, and crust. The inner core is an iron. When the magma erupts, it makes a volcano. And the volcano has two kinds, active volcano and inactive volcano. Both Baekdu mountain and Halla mountain are inactive volcano.

     It was very fun to be in the Museum of Natural History, and i hope other firends can come and look around.