User contributions
- 23:29, 16 June 2023 (diff | hist) . . (0) . . 2790: Heat Pump (→Explanation: ce)
- 14:50, 1 June 2023 (diff | hist) . . (+515) . . Talk:2783: Ruling Out (New comment)
- 23:12, 15 May 2023 (diff | hist) . . (+21) . . 2776: Crystal Ball (→Transcript: optics (physics))