This week was busiest week in my life, I guess. Because I have ¹Ý±â¹® on this week and I went to Damdeok the second yesterday. I was exhausted so I don't have time to study for Damdeok. I was worring about that part. And that day class was just what I expected.  Evendough I didn't prepare for that days class, I decided to enjoy it at the museum of the natural history where the class was hold. I saw dinosaur's fossiles at there. One had sharp teeth and enormous size, another was normal size which had a sharp and flat teeth. And the other which I saw for the last had a very flat and thick teath with horns on it's back. I didn't know we divid dinosaurs with it's shape of teeth. I thout we divided them with the things they usually eat. According to the teacher, we divid dinosaur with shape of it's teeth. And that's why the dinosaur I saw at the museum was different. The dinosaur it was on the first floor that it makes me to reconize for the first. It had a sharp teeth and called 'carnivore'. They often hunt to get a food. And we can proven it threw it's sharp teeth and the claws. If there are violent dinosaur there must be docile dinosaur. We called them as 'harbivore'. They eat gress and fruits which are very hard. So they have flat and strong teeth. And they also eat rock to digeste the things they ate. Remarkably they have some different things that we can't find on the other types of dinosaurs. Particularly, they have horns on their back. It was used to protect them self. The last species that I'm going to tell you now is 'Omnivore'. They have both sharp and flat teeth. The most biggest difference to the others are things that they eat. They east meat and gress, both.

 I didn't know that there was dinosaurs like us exist. And I want to learn more about different criteria, we used for dividing a dinosaurs.