Here's a presentation of the mathematician the article is about. It's on the nature of "Inter-universal Teichmuller Theory"[1] which apparently was the work leading up to the proof.
[1] http://www.kurims.kyoto-u.ac.jp/~motizuki/Inter-universal%20...
[1] http://www.kurims.kyoto-u.ac.jp/~motizuki/Inter-universal%20...
http://mathoverflow.net/questions/106560/what-is-the-underly...
[edit: Oops. Fixed attribution.]
Also, take a look at Minhyong Kim's answer.