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A comment on Can you use a magnifying glass and moonlight to light a fire? (2016).

Re:Can you use a magnifying glass and moonlight to light a f... by proctor on Saturday December 22, 2018 @02:43AM (#18739497)
this article seems to refute some aspects of xkcd's answer:

https://physics.stackexchange.com/questions/370446/is-randal...

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Re:Can you use a magnifying glass and moonlight to light a f... by nkurz on Monday December 24, 2018 @02:27PM (#18753801)
This is indeed a great link (expand the comments on the answer), and shouldn't be languishing at the bottom. Thanks for digging it up!
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