Jack Roosevelt "Jackie" Robinson (January 31, 1919 - October 24, 1972) ni adulawo akoko to gba boolu ni Major League Baseball (MLB) ni igba odeoni.. 
Lapworth, kórìírazing that the fọ́ssil ètò in the disputed strata were different from those of either the camBrian or the àárínan Periods, realized that they should be placed in a period of their own.itọkasi.. 