Io: siarka i wulkany [SOLARIS]

Picked one by one from a mixed channel. Transcript check: both title readers certain; 4 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only these series: SOLARIS planetary-science episodes, Czytamy Upaniszady readings, FILOZUJ episodes that explain a philosophical position (e.g. panpsychism; excluding personal-belief ones) and Czytamy naturę paper-reading episodes. Exclude quizzes and quiz results, podcasts and debates, COVID/current-events analyses, and opinion pieces.