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
First ascent of the Matterhorn of this and they were acquitted. The ascent followed a long series of usually separate attempts by Edward Whymper and Jean-Antoine Carrel to reach the summit. Carrel's group had been 200 m below the summit on the Italian site when Croz and Whymper summited. The climbers from Valtournenche withdrew deflated, but three days later Carrel and Jean-Baptiste Bich reached the summit without incident. The Matterhorn was the last great Alpine peak to be climbed and its first ascent marked the end of the golden age of alpinism. In the summer of 1860, Edward Whymper, an athletic, twenty-year-old English artist, visited