Édouard-Alfred Martel Édouard-Alfred Martel Édouard-Alfred Martel (1 July 1859, Pontoise, Val-d'Oise – 3 June 1938, Montbrison), the 'father of modern speleology', was a world pioneer of cave exploration, study, and documentation. Martel explored thousands of caves in his native France and many other countries, popularised the pursuit of cave exploration, introduced the concept of speleology as a distinct area of scientific study, maintained an extensive archive, and in 1895 founded , the first organisation devoted to cave science in the world. Édouard-Alfred Martel was born in Pontoise, Seine-et-Oise on 1 July 1859. Born into a family of lawyers, he studied at the
Future of space exploration that will serve as the premier observatory of the next decade. It will study the phases of the Universe, providing detailed information on the formation of solar systems and the evolution of space. The future possibilities for deep space exploration are currently held back by a set of technical, practical, astronomical, and human limitations, which define the future of manned and unmanned space exploration. As of 2017, the farthest any man-made probe has traveled is the current NASA mission Voyager 1, currently about 13 billion miles (21 billion km), or 19.5 light hours away from the Earth, while the nearest