Not to plug them or anything, but I found this course on time, entropy, cosmology, etc. absolutely fascinating: http://www.thegreatcourses.com/courses/mysteries

Not to plug them or anything, but I found this course on time, entropy, cosmology, etc. absolutely fascinating: http://www.thegreatcourses.com/courses/mysteries-of-modern-physics-time.html http://www.thegreatcourses.com/courses/mysteries-of-modern-p... I kind of suffered through Physics in undergrad but this makes me wish I took more as an elective.