What happened 14 April in France, French Republic

On 14 April 1898, the Curies optimistically weighed out a 100-gram sample of pitchblende and ground it with a pestle and mortar. They did not realize at the time that what they were searching for was present in such minute quantities that they would eventually have to process tons of the ore.

Du Bois was primary organizer of The Exhibit of American Negroes at the Exposition Universelle held in Paris between April and November 1900, for which he put together a series of 363 photographs aiming to commemorate the lives of African Americans at the turn of the century and challenge the racist caricatures and stereotypes of the day.