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National Institute of Standards and Technology (NIST)
Nist: Physics Measurement Laboratory: Marie Curie and the Nbs Radium Standards
Use this site to learn about Marie Curie and her work with radioactivity which earned her worldwide recognition and two Nobel Prizes. This gallery is organized into a "timeline" of significant events, from 1913 to the present, in which...
PBS
Pbs Nova: Dirty Bomb: Sources of Radiation
In this interactive, learn about sources of both beneficial and harmful radiation which exist in many forms all around us.