Complex sentence: His pioneering work in conservation also contributed greatly to the shift in policy of the International Whaling Commission and signing of the Antarctic Treaty, the latter inspired by his visit to his father's base on Ross Island in Antarctica.
Split into simpler sentences: His pioneering work in conservation also contributed greatly to the shift in policy of the International Whaling Commission and signing of the Antarctic Treaty. The latter inspired by his visit to his father's base on Ross Island in Antarctica.