Today I went to the Museum of Natural History. I saw many natural history things.

 First, I saw a Acrocanthosaurus. It was frightiening and ate meat. Their biggest feature was the long on their tail bones. It looks fierce and it's teeth were very sharp.

 Second, I saw an elephant. An elephant's trunk is made up of numerous muscles. It works like a human's hand. I thought thery're noses were very interesting.

 Do you know about cyanobacteria? Thery're living cells that produce oxygen through photosynthesis.

 When I went to third floor, I was excited. Because on the third floor, they introduced about Space. The Universe was born about 15 billion years ago, the planet we live on, earth, was formed about 4.5 billion years ago

 In space there are 8 planets, starting with the planet closest to the sun.  Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

  There used to be 9 planets, but because of the size of Pluto it is no longer considered to be a planet.

 I think Space is wonderful. It was fun because we went to the Museum of Natural History. 

Good work, remember the correct reason why only 8 planets now exist- good writing