In Einstein’s Cave: Tony Robbin, An Appreciation » still

Still from Banchoff and Strauss’s 1978 film The Hypercube: Projections and Slicing, which is still as good an introduction to four-dimensional math as can be found. (Scroll ahead to the 1 minute mark to skip the extended 3-D title sequence, a novelty at the time.) https://www.youtube.com/watch?v=90olwwLdEYg

Still from Banchoff and Strauss’s 1978 film The Hypercube: Projections and Slicing, which is still as good an introduction to four-dimensional math as can be found. (Scroll ahead to the 1 minute mark to skip the extended 3-D title sequence, a novelty at the time.) https://www.youtube.com/watch?v=90olwwLdEYg