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How We Knew Space Was a Vacuum (2021)
Question: At what point during the history of science did we discover outer space was a vacuum? I’m pretty sure it was before we actually went there, but when did we know for certain? — MC, Algoma, WI
SKY LIGHTS
I regret to announce I’ll be pausing publication of new posts on Sky Lights for an uncertain length of time due to reasons related to my health. I will be unable to respond to emails during this period. The website will remain online, but you won’t get the regular weekly “New science on SKY LIGHTS” notices. I hope to…
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