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Continue to ChatShadows of condensation trails (aka "cirrus aviaticus") https://mirjamglessmer.com/2016/07/14/shadows-of-condensation-trails-aka-cirrus-aviaticus/
Shadows of condensation trails (aka "cirrus aviaticus") https://mirjamglessmer.com/2016/07/14/shadows-of-condensation-trails-aka-cirrus-aviaticus/