Mont Blanc massif led to calls to limit access to the most popular summits and for the mountains to be treated with greater respect. The Mont Blanc massif has provided numerous opportunities for academic research, dating back to the very first ascent of Mont Blanc in 1786 during which Michel Paccard carried scientific equipment to confirm it as the highest summit. In 1820, an ill-fated expedition led by Dr Hamel included pigeons intended for release at varying altitudes to measure the impact of reduced air density on their ability to fly. In 1890, Joseph Vallot built a small meteorological observatory at approximately between
Dan Bryant (mountaineer) With another partner Lud Mahan he was the first to reach the summit via an ice ridge that is now regarded as one of the most difficult routes up the mountain. In 1934 he went to Europe and while attending the London School of Economics he did a great deal of solo climbing in the Alps. This let him meet other climbers and with whom he joined for expeditions. He discovered that his techniques on ice stood good comparison with European climbers, partly because he was used to worse weather conditions. With an American climber he met, Paul Petzoldt, he