Masseutryddelser og klimaendringer gjennom de siste 500 millioner år

New channel Det Norske Videnskaps-Akademi: title sample judged 'pick' (Mostly substantive academic lectures on science/humanities topics, but some entries are panel discussions or policy deba); passed a second screen for sellers/exam-prep/re-uploads; 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.