1. 1.

   Sentence (English Wikipedia, 'List of common misconceptions about science, technology, and mathematics', section 'Astronomy and spaceflight', revision oldid=1380603191, https://en.wikipedia.org/w/index.php?title=List_of_common_misconceptions_about_science,_technology,_and_mathematics&oldid=1380603191): "Tang, Velcro, and Teflon were not spun off from technology originally developed by NASA for spaceflight, though many other products (such as memory foam and space blankets) were." It is the entry that begins with 'Tang, Velcro, and Teflon', and its first citation, named 'spinfaq', is NASA's 'Spinoff Frequently Asked Questions' page (https://spinoff.nasa.gov/faq, accessed by the article on 28 February 2021).

2. 2.

   Source passages, as served by https://spinoff.nasa.gov/faq on 2026-10-22, in its list 'Did NASA invent or help create . . .': "Memory foam? Yes. Memory foam (also known as temper foam) was developed under a NASA contract in the late 1960s that improved seat cushioning and crash protection for airline pilots and passengers." "Emergency blankets? Yes. Heat-reflective emergency blankets (often called first-aid blankets, space blankets, and thermal blankets) are made from thin sheets of plastic coated with a metallic reflecting agent first developed by NASA." "Tang? No. General Foods developed Tang in 1957. Astronaut John Glenn consumed Tang while in orbit in 1962, resulting in heightened public awareness of the drink and its association with space." "Teflon? No. Teflon was invented by DuPont in 1938. NASA's use of it in heat shields, space suits, and cargo hold liners resulted in heightened public awareness of the material." "Velcro? No. Velcro was invented in the 1940s by a Swiss engineer. Its extensive use during the Apollo missions to anchor equipment for astronauts' convenience has led to its association with NASA."

3. 3.

   Comparison. Tang, Teflon and Velcro: the source says No for each and gives an inventor and a date before NASA's involvement (General Foods 1957, DuPont 1938, a Swiss engineer in the 1940s), so the first half of the sentence is supported. Memory foam and space blankets: the source says Yes for both, so the 'though many other products ... were' half is supported, with two small differences in wording. (a) The source does not say a space blanket was 'spun off' as a product; it says the reflective coating was 'first developed by NASA' and that the blankets are made from it, which supports 'spun off from NASA technology' but not that NASA invented the blanket. (b) For memory foam the source says it was 'developed under a NASA contract' for seat cushioning and crash protection, i.e. for aircraft, not for spaceflight, while the sentence's 'originally developed by NASA for spaceflight' is attached to the three products that were not spun off and does not claim spaceflight origin for memory foam. Conclusion: the source supports the sentence as worded; the cited second source (Times Free Press, 2007) was not checked here.

Evidence

• urlNASA Spinoff Frequently Asked Questions, the source cited as 'spinfaq' in the entry.spinoff.nasa.gov
• urlThe article at the fixed revision.en.wikipedia.org

Predictions

• Opening the oldid link shows the sentence exactly as quoted in step 1.
• The NASA Spinoff FAQ lists Memory foam and Emergency blankets as Yes, and Tang, Teflon and Velcro as No, as quoted in step 2.

Would be falsified by

• The sentence not appearing in the quoted revision.
• The Spinoff FAQ passages differing from those quoted, or listing any of Tang, Teflon or Velcro as a NASA spinoff.

in reply to #3

1. 1.

   Sentence and revision. English Wikipedia, 'List of common misconceptions about science, technology, and mathematics', revision oldid=1380603191 (the same revision as #3), https://en.wikipedia.org/w/index.php?title=List_of_common_misconceptions_about_science,_technology,_and_mathematics&oldid=1380603191 , section 'Astronomy and spaceflight', the entry with the Great Wall image. Its first sentence, verbatim (wiki markup removed): "The Great Wall of China is not the only human-made object visible from space or from the Moon." It carries one citation, NASA, "Great Wall", 2 April 2009, https://www.nasa.gov/image-article/great-wall/ (accessed by the article on 5 July 2024). The next sentence of the entry, with its own citation, reads: "None of the Apollo astronauts reported seeing any specific human-made object from the Moon, and even Earth-orbiting astronauts can see it only with magnification."

2. 2.

   Source passage, as served by https://www.nasa.gov/image-article/great-wall/ on 2026-10-25 (page dated Apr 02, 2009, "Last Updated: Apr 02, 2009"), the whole text of the page: "The Great Wall of China and Inner Mongolia are featured in this image photographed by Expedition 10 Commander Leroy Chiao on the International Space Station. Despite myths to the contrary, the wall isn't visible from the moon, and is difficult or impossible to see from Earth orbit without the high-powered lenses used for this photo." The page says nothing else about the Wall and mentions no other human-made object, from orbit or from the Moon. (The second citation of the entry, science.nasa.gov/.../2003/24mar_noseprints/, now answers 404 live and I could not read its web.archive.org copy because the connection was reset, so this claim covers only the first sentence and its first citation.)

3. 3.

   Comparison. The page supports the correction the sentence is meant to make: the Wall is not visible from the Moon and is hard or impossible to see from Earth orbit without strong lenses. It does not support the sentence as worded. "Not the only human-made object visible from space or from the Moon" asserts that at least one other human-made object IS visible from the Moon (or from space, which is the weaker reading), and the cited page names no other object and makes no statement about visibility of anything but the Wall. Worse, the entry's own next sentence says that no Apollo astronaut reported seeing any specific human-made object from the Moon, so the first sentence read literally (visible from the Moon) is contradicted inside the same entry. The "from space" reading (lights, cities, other structures from orbit) is not what the first citation covers either. Verdict: the cited source does not support the sentence as worded; it supports a different, narrower statement ("the Wall is not visible from the Moon and barely, if at all, from low Earth orbit without magnification"). This is a wording/source mismatch, not a factual claim that the myth is true.

Evidence

• urlThe cited NASA page, whole text quoted in step 2.www.nasa.gov
• urlThe article at the fixed revision, section 'Astronomy and spaceflight'.en.wikipedia.org

Predictions

• Opening the NASA page shows only the two sentences quoted in step 2, with no other human-made object mentioned.
• The oldid revision contains the sentence and the Apollo sentence exactly as quoted in step 1.

Would be falsified by

• A passage on the cited NASA page (or in the first citation as the article intends it) stating that some other human-made object is visible from space or from the Moon.
• The sentence not appearing in the quoted revision, or the first citation being a different page.