Dear, Hyeon-Jin

Hi!!! How are you doing? I miss you since the vacation started. Today, I went to Museum of Natural History with Jae-Yun. It was amazing! Hope you and Ye-Eun, Seo-Yun were with us.

First, we saw dinosaurs. We first saw Triceratops, which means three horn faced dinosaur. This is Herbivore. And the Herbivore's features are they have small and flat teeth, and the eyes are on the side. However, the Carnivore animal's features are they have big and sharp teeth, and he eyes are on the front. They also have sharp claws, and their front paws are smaller than back paws. But, we can't be sure the Triceratops is Herbivore, and Tyrannosauras is Carnivore. We can just guess that of comparing with nowdays animals, like Lions or Zebras, which is perfectly Carnivore and Herbivore. The biggest dinosaur in Korea, is Ultrasaurus. Thus, the biggest dinosaur in whole over the world is, Seismosaurus. The name of Seismosaurus means, 'Earthquake lizard'. They named it because they think if the Seismosourus walk, the land will be shaking, because it is too big and heavy. I was impressed about Troodon. They weighed about 22.7kg, and the weight of their brain was between 37~ 45g. These dinosaurs had the most advanced brained.

Second, we saw about solar systems. There are 8 planets, starting with the planet closest to the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto was the solar system too, but because it is too small and far they banned it. The Mercury is same as Rome's god, Hermes. He is the messenger between the gods, and also symboled as lying god. The planet name's Venus is Rome and Greece's beauty and love god, Aphroditae's English name. The Venus is brightess and shining beautifuly, so I think that is why they named it Venus. The Mars is also related with Ares. At Greece, they say Ares, but at Rome, they say Mars. Ares is the God of war, the red is his symbol. So, the red Mars and Ares is similar, so they named Mars. The biggest planet, Jupiter is same as god's best Zeus. Because, the Jupiter is the biggest planet, they use the name Jupiter. The Saturn is related with Zeus or Jupiter's father, Cronus. He is the god of farming, so they named Saturn, which is symboling soil. The Uranus is Gaea(who symbols the Earth)'s husband, who symbols the sky. Finally, Neptun is same with Posaedon, who symbols the sea.  When the planet turns on its axis, it is called rotation, which takes one day. When the Earth revolves around the sun, this is called revolution, which takes one year.

I'll see you at 27th. Good bye~

-You're dearest friend, Minjin-