Dimensions by Jos Leys - Étienne Ghys - Aurélien Alvarez
Chapter 2: Dimension three
M.C. Escher talks about the adventures of two-dimensional creatures trying to imagine what three-dimensional objects look like.
More detailed explanation of Ch 2: http://www.dimensions-math.org/Dim_CH2_E.htm
Visit the site to watch online or download free: http://www.dimensions-math.org/
this is hard
thecoolmex 2 weeks ago