{
  "title": "Galileo’s falling bodies: dated accounts",
  "description": "Dated accounts behind the story of Galileo's falling bodies, one claim per row: his birth and death and the 1638 publication of Two New Sciences (SEP), four statements in the dialogue with their pages in the 1914 translation, the 1914 translation itself, the 1971 Apollo 15 hammer and feather drop (NASA NSSDCA; David Scott's words from the Apollo Lunar Surface Journal), the 2025 SEP revision, and an undated row recording that the dialogue contains no Pisa drop. Each row names its source and locator. Retrieved 2026-10-31. License CC BY 4.0 (facts and arrangement; quoted phrases are from public-domain or short-quoted sources).",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "Puzzles, Charts & Dilemmas",
  "page": "https://puzzleschartsanddilemmas.com/thought-experiments/galileo-falling-bodies/",
  "derived_from": [
    "Galileo, Dialogues Concerning Two New Sciences, trans. Henry Crew and Alfonso de Salvio (New York: Macmillan, 1914), First Day, pp. 61-65, 72, 75-76 (public domain), https://archive.org/details/dialoguesconcern00galiuoft",
    "David Marshall Miller, Galileo Galilei, Stanford Encyclopedia of Philosophy (substantive revision 2025-12-17), https://plato.stanford.edu/entries/galileo/ (dates and short phrases only, no text reproduced)",
    "NASA NSSDCA, The Apollo 15 Hammer-Feather Drop, https://nssdc.gsfc.nasa.gov/planetary/lunar/apollo_15_feather_drop.html",
    "Apollo Lunar Surface Journal, Apollo 15, The Hammer and the Feather, https://apollojournals.org/alsj/a15/a15.clsout3.html (David Scott's own words and mission times only)"
  ],
  "method": "Compiled by Puzzles, Charts & Dilemmas from the data listed",
  "data_credit": [
    "Galileo, Two New Sciences, trans. Crew and de Salvio (1914); Stanford Encyclopedia of Philosophy, Galileo Galilei (2025); NASA NSSDCA; Apollo Lunar Surface Journal"
  ]
}