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#nisyros
#greece
#aegean
#geology
#crater
#stefanos
#hydrothermal
#reserach
#caldera
#volcano
#volcanomonday
#sulfur
#explosion
#science
#the earth story
#geology
#nisyros
#greece
#caldera
#stefanos
#nature
#travel
#landscape
#fumarole
#geothermal
#sulfur
#volcano
#volcanomonday
#the earth story
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