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16 ore 51 min, 16 agos 1868 anni - Jules Janssen discovered helium
Aggiunto al nastro di tempo:
4 set 2017
1
0
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Solar Eclipses in History
Diana Flores
10th grade
World History II
Mrs. Nuttall
Data:
16 ore 51 min, 16 agos 1868 anni
Adesso
~ 155 years ago