These kinds of articles about pi, or numbers, where they try to summon up some mystery and wonder around it, come across to me as not very genuine. I get the impression it gets upvoted because people want to feel like they're smarter, or more geeky and hip for having looked at it.
One of the most "mind boggling" areas of math is number theory
Math dealing with real/complex numbers has been vastly explored, and there are very powerful tools, and computers are very good at these kind of problems (Calculus, etc)
With number theory, progress is much harder, things work in a completely different logic (think for example that 5+3 can be 0 for example)
I don't know, I've met folks for whom math is so magical they do nothing but talk about it all the time. I can recognize that passion in other pursuits as well, from knitting to physics.
I find a close correlation between people who play with numbers to people who like to solve puzzles.
