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5th millennium BC

(6th millennium BC - 5th millennium BC - 4th millennium BC or 40th century BC - other millennia)


Events:

Significant persons:

Inventions, Discoveries, Introductions



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Photosynthesis

... reaction The first stage of the photosynthetic system is the light-dependant reaction, which converts solar energy into chemical energy. Light absorbed by chlorophyll ...

 
 
 
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