User contributions
- 15:39, 13 September 2017 (diff | hist) . . (+73) . . 1889: xkcd Phone 6 (→Added explanation for extra screen)
- 22:35, 1 March 2017 (diff | hist) . . (+158) . . 1805: Unpublished Discoveries
- 18:52, 27 January 2017 (diff | hist) . . (0) . . 1791: Telescopes: Refractor vs Reflector (→The real problems with refractor telescopes)