Conspiracy theory: There's no such thing as corn. Those fields you see are just the stalks of a fungus that's controlling our brains to make us want to spread it.
Alt text: My MRI research shows a clear correlation between the size of the parietal lobe--the part of the brain that handles spatial reasoning--and enjoyment of 3D Doritos®.
Also, for the record, I like folks who share the Alt Text. It gives a place to just talk about the alt text, which for a comic as popular and single-paneled as XKCD, is a nice benefit.
@samuel: looks to be hardware specific. On my iPhone 6S+ long presses on images do nothing – the menu never displays (I tried with and without 3D Touch enabled) — but after powering up my old iPhone 4S, I confirmed that the same version of the app works there. Both devices are running iOS 9.0.2.
THANK YOU! I check my feed on my old iPhone and there is no way to see the alt text at all, even directly on the site. I really appreciate you doing this!
My MRI research shows a clear correlation between the size of the parietal lobe--the part of the brain that handles spatial reasoning--and enjoyment of 3D Doritos®.