First, I learned about the history of living things. The first living thing appeared in Precambrian Era. They are called Cyanobacteria.They did an important thing; they produced oxygen through photosynthesis. Because of this the Earth filled with oxygen, and then there were more living things. In the Mesozoic era dinosaurus appeared. some dinosaurs are Troodons,Tyrannosaurus' and other dinosaurs. Troodons had the most advanced brains. Tyrannosaurus' were the strongest dinosaur on the land. And in the Cenozoic Era, various mammals and humans appeared. This is the history of living things.

    Next,I learn about the history of the Universe. I learned that the Earth was born about 4.6 billion years ago. My friends and I were really surprised. We thought the Earth was very old, but it was not true. The Universe was born about 15 billion years ago during the Big Bang.Wow,isn't that amazing? Earth has more history. A long time, the continents were connected as one piece of land called Pangaea. Pangaea moved slowly and became like this! Also at this time the continents were moving slowly. The Universe is enormous and there are numerous stars. There are also 8 planets, from the closest to the Sun, they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.There is only one planet with known life. That planet is Earth. Space is such a wonderful place and we have to find out about new things about space. History of living things and the Universe is interesting. I want to know more about that.^^

Great work, so much useful information and good commentary by you