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jan 1, 1898 - Marie and Pierre Curie

Description:

Marie and Pierre Curie discover that thorium gives off "uranium rays," which Marie renames "radioactivity."
Marie and Pierre Curie discover polonium and announce the existence of another new radioactive element they
name radium.
Paul Ulrich Villard discovers gamma rays.

Added to timeline:

10 Jun 2018
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Date:

jan 1, 1898
Now
~ 128 years ago

Images: