User contributions
- 14:15, 4 January 2023 (diff | hist) . . (+74) . . 2719: Hydrogen Isotopes (Penning trap (see discussion))
- 18:47, 17 December 2022 (diff | hist) . . (+593) . . 2712: Gravity (add most features of "big earth")
- 10:27, 17 December 2022 (diff | hist) . . (+281) . . 2712: Gravity