But then again as far as I know, the Penrose tile stuff is aimed at no one who reads this blog.
Ignoring that, here's the joke.
"Hey, buddy! We don't allow faster than light neutrinos in this bar!"
A neutrino walks into a bar.
This blog is still alive, just in semi-hibernation.
When I want to write something longer than a tweet about something other than math or sci-fi, here is where I'll write it.