I went to Seodaemun Museum of Natural History. On the third floor, there was an exhibit about the earth's environment. I learned that the earth is made of crust (ground) and metal. Next, we saw fossils. The biggest dinosaurs are the URTRAsaurs.

I learned about Cyanobacteria. Cyanobacteria was the first bacteria on the earth. Cyanobacteria makes oxygen. Many bacteria lived during the Precambrian Era. Plants, insects, reptiles, fish, and amphbians lived during the Palezoic Era. Dinosaurs lived during the Mesozic Era. Lastly,  mammals lived in the Cenozoic Era.

People evolved. First, there were Australopitacos, then Homo erectus, Neanderthals, and Homo Sapiens. People today are Homo Sapiens.

* Hi,

Great job! It seems like you learned a lot. Watch out for spelling errors, though. Also, what do these sentences mean: "I learned that Earth was formed in crust ( ground ), metal, and "there is not the biggest dinosaurs, the URTRAsaurs?" Just want to make sure ^^