Anja von der Linden : Cosmology with Galaxy Clusters

New channel AstronomyHeidelberg: title sample judged 'whole' (Nearly every upload is a full-length expert research colloquium talk on astronomy/astrophysics, consistent with genuine ); 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.