{ "catalogueVersion": "uniruler-preview-2026-10-18-r2", "preparedOn": "2026-10-18", "scope": "Defined length references, not universal physical averages. Preserve dimensions, qualifications and source attribution.", "references": [ { "id": "mm", "label": "Millimetre", "shortLabel": "mm", "category": "metric", "metres": "0.001", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.001 metres per millimetre.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "cm", "label": "Centimetre", "shortLabel": "cm", "category": "metric", "metres": "0.01", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.01 metres per centimetre.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "cm", "referenceRevision": "1" }, { "id": "m", "label": "Metre", "shortLabel": "m", "category": "metric", "metres": "1", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 1 metres per metre.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "m", "referenceRevision": "1" }, { "id": "km", "label": "Kilometre", "shortLabel": "km", "category": "metric", "metres": "1000", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 1000 metres per kilometre.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "km", "referenceRevision": "1" }, { "id": "in", "label": "Inch", "shortLabel": "in", "category": "us_customary_imperial", "metres": "0.0254", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.0254 metres per inch.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "in", "referenceRevision": "1" }, { "id": "ft", "label": "Foot (international)", "shortLabel": "ft", "category": "us_customary_imperial", "metres": "0.3048", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.3048 metres per international foot.", "sourceIds": [ "nist_foot" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "ft", "referenceRevision": "1" }, { "id": "yd", "label": "Yard", "shortLabel": "yd", "category": "us_customary_imperial", "metres": "0.9144", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.9144 metres per yard.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "yd", "referenceRevision": "1" }, { "id": "mi", "label": "Mile (international)", "shortLabel": "mi", "category": "us_customary_imperial", "metres": "1609.344", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 1609.344 metres per international mile.", "sourceIds": [ "nist_foot" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "mi", "referenceRevision": "1" }, { "id": "id1-card-long-edge", "label": "ID-1 size card", "shortLabel": "card lengths", "category": "everyday_objects", "metres": "0.08560", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "long edge", "axis": "long_edge", "description": "Nominal long edge; excludes assumptions about manufacturing tolerances or card thickness.", "sourceIds": [ "icao_card" ], "quantity": "length", "sourceValue": "85.60", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "a4-paper-long-edge", "label": "A4 paper", "shortLabel": "A4 lengths", "category": "everyday_objects", "metres": "0.297", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "long edge", "axis": "long_edge", "description": "Nominal long edge of an A4 sheet; thickness and paper weight are not part of this reference.", "sourceIds": [ "epson_paper" ], "quantity": "length", "sourceValue": "297", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "us-quarter-diameter", "label": "US circulating quarter", "shortLabel": "quarter diameters", "category": "coins", "metres": "0.02426", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Mint-published diameter. Use the metric basis rather than recombining rounded displayed inch values.", "sourceIds": [ "mint_quarter" ], "quantity": "length", "sourceValue": "24.26", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "table-tennis-ball-2025-diameter", "label": "Table tennis ball — 2025 rules", "shortLabel": "ball diameters", "category": "sports", "metres": "0.040", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "2025 regulation specification; not a claim about every manufactured ball or a reviewed 2026 edition.", "sourceIds": [ "ittf_2025" ], "quantity": "length", "sourceValue": "40", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "table-tennis-table-2025-length", "label": "Table tennis table — 2025 rules", "shortLabel": "table lengths", "category": "sports", "metres": "2.74", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "playing-surface length", "axis": "playing_surface_length", "description": "2025 regulation playing-surface length; does not include frame or surrounding playing area.", "sourceIds": [ "ittf_2025" ], "quantity": "length", "sourceValue": "2.74", "sourceUnit": "m", "referenceRevision": "1" }, { "id": "klein-613-3-overall-length", "label": "Klein 613-3 screwdriver", "shortLabel": "screwdriver lengths", "category": "tools", "metres": "0.1651", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Overall tool length, not its separately specified shank length.", "sourceIds": [ "klein_613_3" ], "quantity": "length", "sourceValue": "6.5", "sourceUnit": "in", "referenceRevision": "1", "variant": "613-3, #0 Phillips" }, { "id": "lego-75192-model-length", "label": "LEGO Millennium Falcon 75192", "shortLabel": "LEGO Falcon lengths", "category": "toys", "metres": "0.84", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "assembled model length", "axis": "assembled_model_length", "description": "Rounded assembled physical toy-model length. Not the fictional full-size ship. Source phrasing does not establish a precise tolerance; other axes are not approved here.", "sourceIds": [ "lego_75192" ], "quantity": "length", "sourceValue": "84", "sourceUnit": "cm", "referenceRevision": "1", "variant": "Set 75192" }, { "id": "boeing-747-8-wingspan", "label": "Boeing 747-8 Intercontinental", "shortLabel": "747-8 wingspans", "category": "aircraft", "metres": "68.4", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "full tip-to-tip wingspan", "axis": "full_wingspan", "description": "Tip-to-tip wingspan. Do not relabel as one wing’s structural length or substitute another 747 variant.", "sourceIds": [ "boeing_747_8" ], "quantity": "length", "sourceValue": "68.4", "sourceUnit": "m", "referenceRevision": "1", "variant": "747-8 Intercontinental" }, { "id": "prairie-sensation-apple-diameter", "label": "Prairie Sensation apple", "shortLabel": "apple diameters", "category": "fruits", "metres": "0.0763", "evidenceKind": "sample_mean", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Mean diameter of 10 fruit; sampling date unstated. Not a worldwide apple average.", "sourceIds": [ "usask_apple" ], "quantity": "length", "sourceValue": "7.63", "sourceUnit": "cm", "referenceRevision": "1", "variant": "Prairie Sensation cultivar", "range": { "lowMetres": "0.073", "highMetres": "0.086", "meaning": "Reported cultivar size range; relationship to the 10-fruit sample unspecified; not a confidence interval." }, "sampleCount": 10, "samplingDate": null }, { "id": "pikachu-ordinary-height", "label": "Pikachu — ordinary form", "shortLabel": "Pikachu heights", "category": "fiction", "metres": "0.4", "evidenceKind": "official_fictional_reference", "fictional": true, "dimension": "official Pokédex height", "axis": "official_pokedex_height", "description": "Official fictional height. Not a real animal measurement; excludes Gigantamax.", "sourceIds": [ "pokemon_pikachu" ], "quantity": "length", "sourceValue": "0.4", "sourceUnit": "m", "referenceRevision": "1", "variant": "Pokédex No.0025, ordinary form" }, { "id": "nantes-carrot-root-length", "label": "Nantes-type carrot", "shortLabel": "carrot root lengths", "category": "vegetables", "metres": "0.1651", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "root length, without foliage", "axis": "root_length", "description": "Chosen midpoint for scalar comparisons, not a measured mean; excludes foliage.", "sourceIds": [ "umd_carrot" ], "quantity": "length", "sourceValue": "6.5", "sourceUnit": "in", "referenceRevision": "1", "variant": "Nantes types", "range": { "sourceLow": "6", "sourceHigh": "7", "sourceUnit": "in", "lowMetres": "0.1524", "highMetres": "0.1778", "meaning": "Documented type-level root-length range; no sample count or sampling date stated." } }, { "id": "victorinox-spartan-13603t-listed-length", "label": "Victorinox Spartan pocket knife", "shortLabel": "Spartan knife lengths", "category": "tools", "metres": "0.091", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "manufacturer's listed length", "axis": "manufacturer_listed_length", "description": "Uses the product page's Length specification for item 1.3603.T. Do not reinterpret this value as the blade length or the reach of unfolded implements.", "sourceIds": [ "victorinox_spartan" ], "quantity": "length", "sourceValue": "91", "sourceUnit": "mm", "referenceRevision": "1", "variant": "Item 1.3603.T, red transparent" }, { "id": "nintendo-switch-oled-heg001-width", "label": "Nintendo Switch OLED model", "shortLabel": "Switch OLED widths", "category": "electronics", "metres": "0.242", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall width, with controllers", "axis": "overall_width", "description": "Width of the HEG-001 console with the Joy-Con controllers attached; it is not the display diagonal or the width of the console alone.", "sourceIds": [ "nintendo" ], "quantity": "length", "sourceValue": "242", "sourceUnit": "mm", "referenceRevision": "1", "variant": "HEG-001 console with Joy-Con controllers attached" }, { "id": "airpods-pro2-usbc-case-width", "label": "AirPods Pro 2 USB-C charging case", "shortLabel": "AirPods case widths", "category": "electronics", "metres": "0.0606", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "case width", "axis": "case_width", "description": "Width of the USB-C charging case supplied with the 2023 AirPods Pro 2 model. Uses Apple's metric figure directly; Apple notes that size varies with configuration and manufacturing.", "sourceIds": [ "apple_airpods_case" ], "quantity": "length", "sourceValue": "60.6", "sourceUnit": "mm", "referenceRevision": "1", "variant": "MagSafe Charging Case (USB-C), introduced 2023" }, { "id": "webb-primary-mirror-diameter", "label": "James Webb Space Telescope primary mirror", "shortLabel": "Webb mirror diameters", "category": "science", "metres": "6.5", "evidenceKind": "published_approximation", "fictional": false, "dimension": "primary-mirror diameter", "axis": "primary_mirror_diameter", "description": "NASA's approximate diameter across the primary mirror. This is a linear span, not the collecting area or a single mirror segment's size.", "sourceIds": [ "nasa_webb" ], "quantity": "length", "sourceValue": "6.5", "sourceUnit": "m", "referenceRevision": "1", "variant": "Deployed primary-mirror assembly" }, { "id": "curiosity-rover-length", "label": "Curiosity Mars rover", "shortLabel": "Curiosity rover lengths", "category": "spacecraft", "metres": "3", "evidenceKind": "published_approximation", "fictional": false, "dimension": "vehicle length, without extended arm", "axis": "vehicle_length_excluding_arm_extension", "description": "NASA's approximate rover length, excluding the additional reach of the arm when extended forward. Uses the published 3 m reference rather than converting the rounded 10 ft counterpart.", "sourceIds": [ "nasa_curiosity" ], "quantity": "length", "sourceValue": "3", "sourceUnit": "m", "referenceRevision": "1", "variant": "Mars Science Laboratory rover" }, { "id": "airbus-a380-overall-length", "label": "Airbus A380", "shortLabel": "A380 lengths", "category": "aircraft", "metres": "72.7", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Overall aircraft length as presented in Airbus's February 2022 factsheet. The one-decimal figure is a published reference, not an assertion of millimetre precision.", "sourceIds": [ "airbus_a380" ], "quantity": "length", "sourceValue": "72.7", "sourceUnit": "m", "referenceRevision": "1", "variant": "A380, February 2022 manufacturer factsheet" }, { "id": "mcc-standard-cricket-pitch-length", "label": "Standard cricket pitch", "shortLabel": "cricket pitch lengths", "category": "sports", "metres": "20.1168", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "pitch length", "axis": "pitch_length", "description": "Nominal length between the bowling creases under MCC Law 6.1. Uses the law's 22-yard figure and the exact international-yard conversion; the law displays a rounded 20.12 m counterpart. Junior-cricket lengths can differ.", "sourceIds": [ "mcc_pitch" ], "quantity": "length", "sourceValue": "22", "sourceUnit": "yd", "referenceRevision": "1", "variant": "MCC Law 6.1 standard pitch; junior-cricket variations excluded" }, { "id": "elizabeth-tower-clock-dial-diameter", "label": "Elizabeth Tower clock dial", "shortLabel": "clock-dial diameters", "category": "landmarks", "metres": "7", "evidenceKind": "published_approximation", "fictional": false, "dimension": "clock-dial diameter", "axis": "dial_diameter", "description": "The owner's published diameter of one clock dial, commonly associated with Big Ben. It is not the size of the Great Bell or the height of Elizabeth Tower.", "sourceIds": [ "parliament_clock" ], "quantity": "length", "sourceValue": "7", "sourceUnit": "m", "referenceRevision": "1", "variant": "One Great Clock dial at the Palace of Westminster" }, { "id": "ingenuity-mars-helicopter-rotor-span", "label": "Ingenuity Mars Helicopter", "shortLabel": "Ingenuity rotor spans", "category": "spacecraft", "metres": "1.2", "evidenceKind": "published_approximation", "fictional": false, "dimension": "rotor tip-to-tip span", "axis": "rotor_tip_to_tip_span", "description": "NASA's approximate tip-to-tip rotor span. It is not the length of an individual blade, the sum of both rotor spans, or a measurement of the damaged aircraft after its final flight.", "sourceIds": [ "nasa_ingenuity" ], "quantity": "length", "sourceValue": "1.2", "sourceUnit": "m", "referenceRevision": "1", "variant": "Original design specification" }, { "id": "monarch-butterfly-adult-wingspan-midpoint", "label": "Adult monarch butterfly", "shortLabel": "monarch wingspans", "category": "animals", "metres": "0.0889", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "wingspan", "axis": "wingspan", "description": "An editorial midpoint of the FWS 3-to-4-inch adult wingspan range, used for scalar comparisons. It is not a measured population average; individuals and populations vary.", "sourceIds": [ "fws_monarch" ], "quantity": "length", "sourceValue": "3.5", "sourceUnit": "in", "referenceRevision": "1", "variant": "Danaus plexippus adult; species-account reference", "range": { "sourceLow": "3", "sourceHigh": "4", "sourceUnit": "in", "lowMetres": "0.0762", "highMetres": "0.1016", "meaning": "Published adult wingspan range. No sample count, sampling date, or probability distribution is stated for this range; the page's 7-to-10-cm counterpart is rounded." } } ], "sources": { "nist_length": { "publisher": "NIST", "url": "https://www.nist.gov/pml/owm/si-units-length", "locator": "Units of Length; FAQ on inch redefinition", "contentCheckedOn": "2026-10-18", "id": "nist_length" }, "nist_foot": { "publisher": "NIST", "url": "https://www.nist.gov/pml/us-surveyfoot/revised-unit-conversion-factors", "locator": "International foot metric-equivalent table", "contentCheckedOn": "2026-10-18", "id": "nist_foot" }, "icao_card": { "publisher": "ICAO", "url": "https://www.icao.int/sites/default/files/publications/DocSeries/9303_p5_cons_en.pdf", "locator": "Section 2.1; PDF page 9; nominal ID-1 dimensions referenced by TD1", "contentCheckedOn": "2026-10-18", "id": "icao_card" }, "epson_paper": { "publisher": "Epson", "url": "https://files.support.epson.com/htmldocs/r800__/r800__rf/spec_2.htm", "locator": "Paper specifications — single sheets", "contentCheckedOn": "2026-10-18", "id": "epson_paper" }, "mint_quarter": { "publisher": "United States Mint", "url": "https://www.usmint.gov/learn/coins-and-medals/circulating-coins/quarter", "locator": "Coin specifications — diameter", "contentCheckedOn": "2026-10-18", "id": "mint_quarter" }, "ittf_2025": { "publisher": "International Table Tennis Federation", "url": "https://db.ittf.com/sites/default/files/public/2025-02/2025_ITTF_Statutes_clean_version.pdf", "edition": "2025", "locator": "Printed/PDF page 38, sections 2.1.1 and 2.3.1", "contentCheckedOn": "2026-10-18", "id": "ittf_2025" }, "klein_613_3": { "publisher": "Klein Tools", "url": "https://data.kleintools.com/sites/all/product_assets/documents/brochures/klein/KleinTools_Drivers.pdf", "locator": "PDF page 5, Electronics Screwdrivers table, model 613-3", "contentCheckedOn": "2026-10-18", "id": "klein_613_3" }, "lego_75192": { "publisher": "LEGO", "url": "https://www.lego.com/en-us/product/millennium-falcon-75192", "locator": "Specifications, assembled dimensions", "contentCheckedOn": "2026-10-18", "id": "lego_75192" }, "boeing_747_8": { "publisher": "Boeing", "url": "https://www.boeing.cn/productsandservices/747/", "locator": "747-8 Intercontinental technical specifications — wingspan", "corroboratingUrl": "https://www.boeing.com/content/dam/boeing/v2/airports/7478-airport-comp/AERO_2010_q3_article3.pdf", "contentCheckedOn": "2026-10-18", "id": "boeing_747_8" }, "usask_apple": { "publisher": "University of Saskatchewan Fruit Program", "url": "https://research-groups.usask.ca/fruit/our-varieties/apple-varieties.php", "locator": "Prairie Sensation, accession 18-10-32", "contentCheckedOn": "2026-10-18", "id": "usask_apple" }, "pokemon_pikachu": { "publisher": "The Pokémon Company", "url": "https://in.portal-pokemon.com/pokedex/0025/", "locator": "Pikachu No.0025, ordinary form, Height", "contentCheckedOn": "2026-10-18", "id": "pokemon_pikachu" }, "umd_carrot": { "publisher": "University of Maryland Extension", "url": "https://www.extension.umd.edu/resource/growing-carrots-home-garden", "locator": "Growing and care of carrots — Nantes types", "pageUpdatedOn": "2023-02-20", "contentCheckedOn": "2026-10-18", "id": "umd_carrot" }, "victorinox_spartan": { "publisher": "Victorinox", "title": "Spartan — item 1.3603.T", "url": "https://www.victorinox.com/en/Products/Swiss-Army-Knife%E2%84%A2-and-Tools/Essentials/Spartan/p/1.3603.T", "locator": "Dimensions: Length; Details: Item number", "sourceType": "primary_manufacturer", "contentCheckedOn": "2026-10-18", "factSummary": "The product specification lists length 91 mm for Spartan item 1.3603.T.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://www.victorinox.com/en/Products/Swiss-Army-Knife%E2%84%A2-and-Tools/Essentials/Spartan/p/1.3603.T", "contentType": "text/html; charset=utf-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "victorinox_spartan" }, "nintendo": { "publisher": "Nintendo", "title": "Nintendo Switch OLED model console [HEG-001] specifications", "url": "https://www.nintendo.com/ph/hardware/switch/modal/specs/body_oled.html", "locator": "Size row, including the with-Joy-Con qualifier", "sourceType": "primary_manufacturer", "contentCheckedOn": "2026-10-18", "factSummary": "The console is specified as 242 mm wide with the Joy-Con controllers attached.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://www.nintendo.com/ph/hardware/switch/modal/specs/body_oled.html", "contentType": "text/html", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "nintendo" }, "apple_airpods_case": { "publisher": "Apple", "title": "AirPods Pro 2 with MagSafe Charging Case (USB-C) — Tech Specs", "url": "https://support.apple.com/en-us/111834", "locator": "Size and Weight: MagSafe Charging Case (USB-C); footnote 10", "sourceType": "primary_manufacturer", "contentCheckedOn": "2026-10-18", "factSummary": "The USB-C charging case width is specified as 60.6 mm; the model was introduced in 2023 and manufacturing variation is acknowledged.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://support.apple.com/en-us/111834", "contentType": "text/html;charset=utf-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "apple_airpods_case" }, "nasa_webb": { "publisher": "NASA", "title": "Webb: Fact Sheet", "url": "https://science.nasa.gov/mission/webb/fact-sheet/", "locator": "Fact-sheet table: Diameter of Primary Mirror", "sourceType": "primary_mission_operator", "contentCheckedOn": "2026-10-18", "factSummary": "NASA gives an approximate primary-mirror diameter of 6.5 m.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://science.nasa.gov/mission/webb/fact-sheet/", "contentType": "text/html; charset=UTF-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "nasa_webb" }, "nasa_curiosity": { "publisher": "NASA / Jet Propulsion Laboratory", "title": "NASA Mars Rover Curiosity at JPL, Side View", "url": "https://science.nasa.gov/photojournal/nasa-mars-rover-curiosity-at-jpl-side-view/", "locator": "Photojournal PIA13808: description paragraph", "sourceType": "primary_mission_operator", "contentCheckedOn": "2026-10-18", "factSummary": "NASA describes a rover length of about 3 m before adding the reach of the forward-extending arm.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://science.nasa.gov/photojournal/nasa-mars-rover-curiosity-at-jpl-side-view/", "contentType": "text/html; charset=UTF-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "referencePublishedOn": "2011-04-06", "id": "nasa_curiosity" }, "airbus_a380": { "publisher": "Airbus", "title": "A380 Facts and Figures — February 2022", "url": "https://www.airbus.com/sites/g/files/jlcbta136/files/2025-01/airbus-a380-facts-and-figures-february-2022.pdf", "locator": "PDF page 3 of 4: Overall length row", "sourceType": "primary_manufacturer", "contentCheckedOn": "2026-10-18", "factSummary": "The February 2022 factsheet gives an overall aircraft length of 72.7 m.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://www.airbus.com/sites/g/files/jlcbta136/files/2025-01/airbus-a380-facts-and-figures-february-2022.pdf", "contentType": "application/pdf", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "referencePublishedOn": "2022-02", "referenceEdition": "February 2022", "edition": "February 2022", "id": "airbus_a380" }, "mcc_pitch": { "publisher": "Marylebone Cricket Club (MCC)", "title": "Law 6: The Pitch", "url": "https://lawsofcricket.lords.org/laws-of-cricket/setting-up-the-game/the-pitch", "locator": "6.1 Area of pitch; 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charset=utf-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "parliament_clock" }, "nasa_ingenuity": { "publisher": "NASA / Jet Propulsion Laboratory", "title": "Ingenuity Mars Helicopter", "url": "https://science.nasa.gov/mission/mars-2020-perseverance/ingenuity-mars-helicopter/", "locator": "Tech Specs: Width and Blade span rows", "sourceType": "primary_mission_operator", "contentCheckedOn": "2026-10-18", "factSummary": "NASA specifies a rotor tip-to-tip span of approximately 1.2 m.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://science.nasa.gov/mission/mars-2020-perseverance/ingenuity-mars-helicopter/", "contentType": "text/html; charset=UTF-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "nasa_ingenuity" }, "fws_monarch": { "publisher": "U.S. Fish and Wildlife Service", "title": "Monarch (Danaus plexippus)", "url": "https://www.fws.gov/species/monarch-danaus-plexippus", "locator": "Physical Characteristics: Size & Shape; Measurements: Wingspan", "sourceType": "primary_government_science", "contentCheckedOn": "2026-10-18", "factSummary": "The species account gives an adult wingspan range of 3 to 4 inches and describes variation between populations.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://www.fws.gov/species/monarch-danaus-plexippus", "contentType": "text/html; charset=utf-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "fws_monarch" } } }