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1 gen 100 anni - Ptolemy's Discovery
Descrizione:
Ptolemy discovered how light beams bend when traveling from air to glass.
Aggiunto al nastro di tempo:
Gr. 8 Science Unit C Section 1.0 Timeline
By
April Santos
5 nov 2018
0
0
313
Data:
1 gen 100 anni
Adesso
~ 1925 years ago
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