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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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25 abr 1879 año - Thomas Edison
Descripción:
Invented lightbulb, and electricity effects people's natural melatonin and seasonal sleep patterns
Añadido al timeline:
History of Sleep study
By
K
9 oct 2018
0
0
412
fecha:
25 abr 1879 año
Ahora mismo
~ 146 years ago
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