{
  "name": "Sizes along an insect's air path, from spiracle to tracheole",
  "desc": "Stated and measured sizes along the insect air path: tracheoles, tracheae followed by x-ray video, a firefly larva's spiracle opening, one fruit-fly flight muscle and the largest fossil wingspans, one claim per row with method, source and reading level.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "Ants, Cells & Atoms",
  "url": "https://antscellsandatoms.com/insects/how-insects-breathe/",
  "from": [
    "Li et al. 2018 Fig 7 and Dunn et al. 2022 Fig 4A as published by PLOS ONE (scale-bar and outline pixel counts given in the CSV method column)",
    "Socha et al. 2007, Sauerwald et al. 2019, Clapham & Karr 2012, Preuss et al. 2025 (stated values)"
  ],
  "how": "Compiled by Ants, Cells & Atoms from the data listed",
  "data_by": [
    "Li K et al. 2018, PLoS ONE 13(7):e0200405, CC BY 4.0, https://doi.org/10.1371/journal.pone.0200405, retrieved 2026-10-24",
    "Dunn KN et al. 2022, PLoS ONE 17(6):e0268112, CC BY 4.0, https://doi.org/10.1371/journal.pone.0268112, retrieved 2026-10-24",
    "Socha JJ et al. 2007, BMC Biology 5:6, CC BY 2.0, https://doi.org/10.1186/1741-7007-5-6, retrieved 2026-10-24",
    "Sauerwald J et al. 2019, eLife 8:e48857, CC BY 4.0, https://doi.org/10.7554/eLife.48857, retrieved 2026-10-24",
    "Clapham ME, Karr JA 2012, PNAS 109(27):10927-10930, https://doi.org/10.1073/pnas.1204026109 (abstract), retrieved 2026-10-24",
    "Preuss A et al. 2025, Communications Biology 8:852, CC BY 4.0, https://doi.org/10.1038/s42003-025-08285-4 (plastron hair density; spacing computed 2026-10-24), retrieved 2026-10-24"
  ]
}