MadSci Network: Science History
Query:

Subject: When was the lever invented?

Date: Thu Feb 10 20:42:09 2000
Posted by John
Grade level: K-3 School: osburn
City: silverton State/Province: ID Country: U.S.A
Area of science: Science History
ID: 950236929.Sh
Message:

I might need to know because my class is learning about simple macchines.


Re: When was the lever invented?

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