Measuring radioactivity without a Geiger counter... how did Marie Curie do it?

As Women's History Month continues, Professor Davis explains how Marie Curie was able to make measurements of radioactivity with 1890's technology, and how her measurements led to the discovery of two new elements!
Read more about Marie Curie's accomplishments:
history.aip.org/exhibits/curi...
Find my Wondrium course HERE:
www.wondrium.com/understandin...
Pitchblende image attribution:
Jędrzej Pełka, CC BY-SA 3.0 creativecommons.org/licenses/..., via Wikimedia Commons
All other images are public domain or copyright ChemSurvival Enterprises, LLC

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