I Don't Know What It Is I Don't Know What It Is "I Don't Know What It Is" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright. It was the first single from Wainwright's third studio album "Want One" and was released in a slim-line jewel case format on July 26, 2004. In addition to the UK and Japanese versions of "Want One", the song also appears on the bonus DVD that accompanies "Want Two" ("Rufus Wainwright: Live at the Fillmore"), "All I Want" (DVD), and "Want", a repackaged UK double album that contains "Want One" and "Want Two". In "All I Want", producer
Rule of thirds (diving) Rule of thirds (diving) In scuba diving, the rule of thirds is a rule of thumb used by divers to plan dives so they have enough breathing gas remaining in their diving cylinder at the end of the dive to be able to complete the dive safely. This rule generally only applies to diving in overhead environments, such as caves and wrecks, where a direct ascent to the surface is impossible and the divers must return the way they came. For divers following the rule, one third of the gas supply is planned for the outward journey, one third is