Dava Sobel, Cecilia Payne e Henrietta Leavitt

New channel Accademia delle Scienze di Torino: title sample judged 'pick' (Mostly substantive academy lectures and conference sessions on science/humanities topics, but mixed with short instituti); passed a second screen for sellers/exam-prep/re-uploads; 1 of 3 sampled transcripts showed teaching, 1 not; titles picked one by one, checked strictly; oEmbed verified.