PetaPixel is a photography blog geared towards tech-savy photography geeks that was founded by Michael Zhang. For those interested, peta is the prefix that denotes 1015.
One of PetaPixel’s faithful readers has watched Side by Side and noticed that Keanu Reeves was reading one of the blog’s posts in the film. In several of the interviews that Keanu did for Side by Side, he said that he prepared for all of the interviews and now we can see at least one of his sources.
The blog post is here.