On tetrahedra and tuition

My son bought me these polished hematite balls. We're both hematite fans. They're quite magnetic. If you get the rotations right they're happy enough to sit in this arrangement. At the beginning of this year I began a Diploma in Science, at the University of Queensland. For several years I've been thinking about how much I'd like to return to tertiary studies. There's so much I want to learn about…