Today,I went Museum of Natural History with my friends and teacher.In there,I learn about the history of Universe,and history of living things.

    First,I learn about the history of living things.The first living thing appeared in Precambrian Ear.That is Cyanobacterias.They did important thing,that produce oxygen through photosynthesis.Because,Earth filled with oxygen,there were various living things.In Mesozoic era,in that time,dinosaurus appeared and lived.In dinosaurs,there is Troodon,Tyrannosaurus and another dinosaurs.Troodon had the most advanced brains.Tyrannosaurus is the strongest dinosaur on the land.And in Cenozoic Era,a verious mammals,and human appeared.These are the history of living things.

    Next,I learn about the history of Universe.I learned the Earth's Birth first.Earth was born about 4.6 billion years ago.My friends and me was really surprised.We thought Earth is very old ,but it was not true.Earth was young baby star.Because the Universe was born about 15 billion years ago during the Big Bang.Wow,isn't it amazing?Earth has another history.A long time,the continents were connected as one piece of land called Pangaea.Pangaea moved slowly and became like this!Also,this time,may continents are moving slowly.The Universe is enormous,and in the Universe,there is numerous stars.And there's 8 planets,that closet to the Sun,these are Mercury,Venus,Earth,Mars,Jupiter,Saturn,Uranus,and Neptune.There is only one plaet that a living thing can live.That planet is the Earth.Space is such a wonderful place.And we have to find new thing of space.History of a living thing and Universe is interesting thing.I want to know more about that.^^