A. We knew very little about the elusive and mysterious giant until 2012, when Drs. Edith Widder, Steve O'Shea and Tsunemi Kobodera filmed it in its natural deep-sea habitat for the first time …

B. It was not until 2012 that Drs. Edith Widder, Steve O'Shea and Tsunemi Kobodera filmed the elusive and mysterious giant in its natural deep-sea habitat for the first time …