Hannes Keller was born on 20 September 1934 in Winterthur, Switzerland. He was married to Tzuara Keller-Takahashi and Esther Frei. He died on 1 December 2022 in Wallisellen, Switzerland.
Deep-sea explorer who survived a record descent to more than 1,000 feet in a diving bell. He used a new mixture of gases to lessen the risks of the bends. His diving companion, Peter Small, did not survive the ascent.
