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Hans Hass, Austrian biologist and diver (born 1919)

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Hans Hass
Austrian biologist, film-maker, and underwater diving pioneer
Hans Hass was an Austrian biologist and underwater diving pioneer. He was known mainly for being among the first scientists to popularise coral reefs, stingrays, octopuses and sharks. He pioneered the making of documentaries filmed underwater and led the development of a type of…Source: Wikipedia (CC BY-SA)