Free online Courses from top Universities
I came across this wonderful resource provided by Open Culture with a list of 1300 free online courses from top Universities around the world. The subjects range from Political Science, Astronomy, Engineering, AI, Biology, Climate change, Art History, Religion, Mythology, Design Thinking, Business and anything else you'd want to know more about.
Check out one of these lectures when you have some spare time from the link below.
Open Culture (2018) Available at: http://www.openculture.com/freeonlinecourses