[sean-duffy]

Must admit, when I first saw the url I started wondering how on earth Mark Zuckerberg has the time to be writing raytracers. Made more sense when I scrolled to the bottom.

[ihsw]

You could also reformat the URL to see their profile.

https://mzucker.github.io/2016/08/03/miniray.html

becomes

https://github.com/mzucker

GitHub Pages uses their profile name as the github.io sub-domain.

[blacksmythe]

Also:

  >> Once I made a robot to play video games for me.

[kristianp]

This is the link

https://www.youtube.com/watch?v=-AP0de3yZTs