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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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5 h 42 m, 1 ene 1932 año - The phase contrast microscope was invented.
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microscope through the years
By
Kaitlyn Hornung
28 sep 2017
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466
fecha:
5 h 42 m, 1 ene 1932 año
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~ 93 years ago
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