If a comet hit the earth, how would that cause the extinction of human?

Subject: If a comet hit the earth, how would that cause the extinction of human?

Date: Fri May 15 12:21:39 1998
Posted by Sunny
Grade level: 10-12
School: Oswego High School
City: Oswego State/Province: NY
Country: US
Area of science: Astronomy
ID: 895252899.As

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Re: If a comet hit the earth, how would that cause the extinction of human?

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