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This general view shows The Brenva Glacier and The Aiguille Noir (L) in Courmayeur, Alps Region, north-western Italy, on August 3, 2021. - A melting glacier is posing challenges this summer for scientists on Italy's side of the Mont Blanc massif, where the risk of collapse in rising temperatures threatens the valley below. The Planpincieux glacier, at an altitude of about 2,700 metres (8,860 feet), hangs over the hamlet of Planpincieux, underneath the south face of the Grandes Jorasses within the Mont Blanc massif in Italy's picturesque northwest corner. (Photo by Marco Bertorello / AFP) (Photo by MARCO BERTORELLO/AFP via Getty Images)