http://en.wikipedia.org/wiki/Cohesion_%28chemistry%29 (5 years and 2748 days ago)
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(5 years and 2752 days ago)
fantastic
Rust is a general term for describing iron oxides. In colloquial usage, the term is applied to red oxides, formed by the reaction of iron and oxygen in the presence of water or air moisture (5 years and 2751 days ago)
(5 years and 2750 days ago)
http://en.wikipedia.org/wiki/Archimedes%27_principle (5 years and 2754 days ago)
wow, strong picture
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