Lineweaver, CharlesDeustua, S.Eastwood, K.TenKate, IL.2023-11-172023-11-17July 03-08http://hdl.handle.net/1885/306395Massive Open Online Courses (MOOCs) are becoming the textbooks of the 21st century. I describe what a MOOC is, and try to answer the questions: Why make a MOOC? Who are MOOCs for? and How to make a MOOC? Anxiety about MOOCs replacing teachers is largely misplaced. I describe my on-going experience of putting together an astrobiology MOOC for the Australian National University.application/pdfen-AU© 2019 The Authorshttp://creativecommons.org/licenses/by/4.02019-02-0110.1051/epjconf/2019200010192022-08-07Creative Commons Attribution License