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jan 21, 1890 - Marie Curie discovered the field of atomic physics, "radioactivity". This is extra important because she is a women in the STEM field. https://www.biography.com/people/marie-curie-9263538
Added to timeline:
First Era Timeline
By
Kara Wood
8 Nov 2017
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Date:
jan 21, 1890
Now
~ 135 years ago
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