1교시 . 40억년 전의 운석충돌.
![](https://100books.kr/data/cheditor/0811/img_8507.jpg)
![](https://100books.kr/data/cheditor/0811/1_copy1.jpg)
![](https://100books.kr/data/cheditor/0811/3___1.jpg)
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![](https://100books.kr/data/cheditor/0811/__3.jpg)
![](https://100books.kr/data/cheditor/0811/__4.jpg)
![](https://100books.kr/data/cheditor/0811/__5_copy.jpg)
![](https://100books.kr/data/cheditor/0811/__6.jpg)
![](https://100books.kr/data/cheditor/0811/__7.jpg)
![](https://100books.kr/data/cheditor/0811/1_copy3.jpg)
![](https://100books.kr/data/cheditor/0811/_2_1.jpg)
![](https://100books.kr/data/cheditor/0811/_2_2.jpg)
![](https://100books.kr/data/cheditor/0811/_2_3.jpg)
![](https://100books.kr/data/cheditor/0811/_2_4.jpg)
![](https://100books.kr/data/cheditor/0811/__.jpg)
아리조나의 운석구덩이를 만든 운석은 겨우 지름이 10미터도 안되는 걸로 추정된다죠.
지름 10km의 운석은 공룡을 멸종시켰구요.
그런데 지금 500km라니.
지구는 험난한 역경을 거쳐 왔군요.
![](https://100books.kr/data/cheditor/0811/2_copy2.jpg)
![](https://100books.kr/data/cheditor/0811/5.jpg)
2교시. 22억년 전의 눈덩이 지구.
![](https://100books.kr/data/cheditor/0811/_copy4.jpg)
![](https://100books.kr/data/cheditor/0811/4_copy3.jpg)
![](https://100books.kr/data/cheditor/0811/__1.jpg)
![](https://100books.kr/data/cheditor/0811/__2_copy.jpg)
![](https://100books.kr/data/cheditor/0811/__3_copy.jpg)
![](https://100books.kr/data/cheditor/0811/5_copy1.jpg)
![](https://100books.kr/data/cheditor/0811/img_8508.jpg)
![](https://100books.kr/data/cheditor/0811/6.jpg)
![](https://100books.kr/data/cheditor/0811/1___copy2.jpg)
![](https://100books.kr/data/cheditor/0811/__6___copy1.jpg)
![](https://100books.kr/data/cheditor/0811/7_copy.jpg)
![](https://100books.kr/data/cheditor/0811/8_copy.jpg)
![](https://100books.kr/data/cheditor/0811/11_copy1.jpg)
박문호 박사님 강연은 계속 됩니다. 쭈욱~ ^-^