#OnThisDay, 19 Apr 1967, Katherine Switzer becomes the first woman to complete the Boston Marathon as a registered runner, despite the organiser physically trying to stop her.

She ran it again in 2017, 50 years later.

#WomenInHistory #OTD #History #AmericanHistory

#OnThisDay, 7 Jan 1939, French physicist Marguerite Perey discovers element 87, which she later names francium. It was the last element to be discovered naturally.

Perey was a student of Marie Curie, and was nominated five times for the Nobel Prize but never received it.

#WomenInHistory #WomenInSTEM #ScienceHistory #History #Histodons