Some years ago I heard about the OER (Open Educational Resources) initiative launched by MIT (see for example https://ocw.mit.edu/courses/physics/8-282j-introduction-to-astronomy-spring-2006/). For several years after I was an avid follower of MIT's open-courseware programmes, but mostly in a casual and dilettantish sort of way. Nevertheless I did learn a lot and it was an invaluable experience. Recently I discovered the research reports (academic articles) published by the anthropologists and geologists who had discovered and are exploring the fossilized remains of Homo naledi , a new species of the genus Homo discovered in the Rising Star complex of caves near Johannesburg in South Africa in 2013. These reports are all freely available in the open access journal e-life sciences (for example at https://elifesciences.org/articles/09560 ). Dedicated reading of these fascinating articles can nurture the amateur anthropologist or geologist in anyone...