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25 Apr 1879 Jahr - Thomas Edison

Beschreibung:

Invented lightbulb, and electricity effects people's natural melatonin and seasonal sleep patterns

Zugefügt zum Band der Zeit:

History of Sleep study

ByK

9 Okt 2018

0

0

412

Datum:

25 Apr 1879 Jahr

Jetzt

~ 146 years ago

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