Física de rayos cósmicos con Trasgos: La atmósfera (Juan A. Garzón)

New channel IGFAE: title sample judged 'pick' (Mostly genuine physics seminars, courses, and colloquia, but mixed with some roundtable chats, institutional promos, and); passed a second screen for sellers/exam-prep/re-uploads; 3 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.