Ali Yamaç is a Turkish speleologist. He was born in 1957 and has been caving since 1976. During these years he has surveyed and explored hundreds of caves, some of which are the longest and deepest caves in Turkey. He was the president of the Speleological Federation of Turkey in 2007-2009 and the president during the foundation of three different speleological organisations. He was the leader of the team that prepared the cave inventory of Turkey. In addition to his natural cave explorations, he has explored and surveyed numerous rock dwellings and underground cities in different regions of Turkey as part of his artificial cave projects. Beginning with surveys of the underground structures of Hagia Sophia and Topkapi Palace in Istanbul, his artificial cave projects continue with underground structure inventory projects in the provinces of Kayseri and Gaziantep. Both projects have been underway for more than ten years and both have been accepted to the UNESCO World Heritage Tentative List. At the request of the directors of the Nevşehir and Aksaray Archaeological Museums, he has surveyed the underground shelters of Derinkuyu, Mazıkoy, Mazıkoy 2, Tatlarin, Avanos, Golgoli and St. Mercurius; he has also investigated rock-cut settlements and churches on the Euphrates River cliffs as part of the Euphrates River Cliff Settlements Project; and he has surveyed several settlements as part of the Kura River - Ardahan Region Survey.Ezgi Tok is a Turkish speleologist. Her research focuses on microbial life and related components of cave environments. Since 2016, she has been exploring several karst caves in Turkey to determine microbial diversity, ecosystem functioning of microbial populations, and their relationship with psychochemical conditions in the cave ecosystem. Her research also investigates the influence of surface atmospheric conditions on the subsurface microclimate. Her current project is the first cave microbiology study in Turkey comparing caves from different climatic regions with different environmental conditions. She has been caving since 2009 and has participated in several national and international speleological expeditions in Turkey and abroad, such as the Lion of Crete expedition, the 2nd deepest cave in Greece, and the Keş and Çem cave expeditions, the 6th and 10th deepest caves in Turkey. She had surveyed and mapped several caves of Turkey, among which İnsuyu Cave, which is the longest and Kocain Cave, which is the largest chamber of Turkey are particularly important. In addition to these works, she has also participated in artificial cave projects. She has surveyed and mapped several underground shelters in Cappadocia and dozens of rock cut structures as part of underground structure inventory projects in the provinces of Kayseri and Gaziantep.
