History: Halley Hollow Earth

23 May 2022

• curprev 20:1720:17, 23 May 2022‎ BruceGrubb Message Wall contribs‎ 535 bytes +3‎ No edit summary Tag: Source edit

30 July 2018

• curprev 13:5813:58, 30 July 2018‎ BruceGrubb Message Wall contribs‎ 532 bytes +26‎ No edit summary
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20 October 2012

• curprev 14:3214:32, 20 October 2012‎ RogerCooper Message Wall contribs‎ 505 bytes +505‎ Created page with "From the article "Underground" in GURPS All-Star Jam 2004 The astronomer Edmund Halley in 1692 suggested that the Earth consisted of 5 shells, each with its own atmosphere & ..."