It's instead a photo of Susan Marie Frontczak, snapped by Paul Schroder in 2001. Frontczak makes a living portraying the famous scientist on stage, and has done so for 13 years, in some 350 performances across 30 U.S. states and nine countries, she told Popular Science. The image (of Frontczak) can be found on "Marie Curie"-themed stamps in Mali, the Republic of Togo, Zambia, and the Republic of Guinea.