Today, we went to Museum Of Natrual History. In the book, I learned that Universe was born about 15 billion years ago.Also, about 4.6 years ago, the earth was formed. A long time ago, the continents were connected. It was called pangaea. In the space, there were 9 planets. There were sun, mars, mercury, venus, earth, jupiter, saturn, urginus and neptune. The rotation of the earth took 1 day. And revolution of earth took 1 year. Today, the museum was very cool. It felt very good and I think today was a good day.