During the same period, Wiese joined a medical expedition on Mount Everest. He also skied cross-country to the North Pole and was a member of a 2004 expedition to Yeronisos island in Cyprus. In addition, he led a 2009 expedition to bio-prospect for extremophiles and new life forms in Mount Kilimanjaro's Ngorongoro Crater, resulting in the discovery of 29 new life forms. That expedition to Mount Kilimanjaro also involved placing the first weather station on its slopes, which has been crucial for tracking the effects of global warming.