There are six types of leptons, including three charged particles and three neutral ones. Electrons were first discovered in 1897 by Thomson, with a mass of 0.511 MeV. Muons were discovered in 1936, 207 times more massive than electrons. Tau particles were discovered in 1975, 3,700 times more massive than electrons
Born in 1826 in County Offaly, Ireland. Graduated from Trinity College Dublin with B.A. in 1848. Worked as astronomy assistant to William Parsons at Birr Castle
Project Spacetime is a remake of Outertale by 2mi127. Game requires playing UNDERTALE first. Developed by The Mavis & Co. with TypeScript and Storyteller engine. Supports iOS via web version and controller input
Cathode rays were first observed in 1859 by Plücker and Hittorf. They were named by Goldstein in 1876 as cathode rays. Crookes tubes were developed to produce cathode rays at lower pressure
Periodic table organizes elements by atomic structure and color-coding. Elements are arranged by atomic number in three main groups. Atomic number appears above element symbol in upper left corner
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