http://gregorygundersen.com/blog/2020/01/12/why-research-blo... has a HTTP header last updated on 01/13/2020 04:34:31.
http://gregorygundersen.com/blog/2019/12/23/random-fourier-f... is 01/13/2020 04:34:30, or 1 second earlier.
Also the source code has a link to http://gregorygundersen.com/css/markdown.css which 404's.