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Title: Among scientific observations by Song intellectuals was Post by: Rodas on Jan 15, 2018 Among scientific observations by Song intellectuals was
a. the explosion of the Crab Nebula in 1054 b. the discovery of sun spots c. invention of a zero for mathematic calculations. d. retrograde motion of Mercury. e. recirculation of blood through the arterial system. Title: Among scientific observations by Song intellectuals was Post by: Aseize on Jan 15, 2018 Content hidden
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