Members of the world wide diving community honoured Dr Hans Hass during celebrations for his 90th birthday. Prof. Dr. Hans Hass’s wife Lotte Baierl was also present during the event. Hans Hass (born January 23, 1919 in Vienna, Austria) is a diving pioneer and mainly known for his documentaries about sharks the energon theory, and his commitment, later in life, to the protection of the environment.
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