Question: Which documentary  was directed in part by James Cameron, Aliens of the Deep or Earth?
Context: Earth is a 2007 nature documentary film which depicts the diversity of wild habitats and creatures across the planet.  The film begins in the Arctic in January of one year and moves southward, concluding in Antarctica in the December of the same year.  Along the way, it features the journeys made by three particular species—the polar bear, African bush elephant and humpback whale—to highlight the threats to their survival in the face of rapid environmental change.  A companion piece to the 2006 BBC/Discovery television series "Planet Earth", the film uses many of the same sequences, though most are edited differently, and features previously unseen footage. Aliens of the Deep is a 2005 documentary film, directed in part by James Cameron alongside fellow cameraman and friend Steven Quale, who would go on to direct "Final Destination 5" six years later, and filmed in the IMAX 3D format.  It was produced by Walden Media and Walt Disney Pictures.  Cameron teams with NASA scientists to explore the Mid-Ocean Ridges, submerged chains of mountains in the Atlantic and Pacific oceans that are home to some of the planet's more unusual forms of life. James Cameron is a Canadian director, screenwriter, and producer who has had an extensive career in film and television.  Cameron's debut was the 1978 science fiction short "Xenogenesis", which he directed, wrote and produced.  In the early part of his career, he did various technical jobs such as special visual effects producer, set dresser assistant, matte artist, and photographer.  His feature directorial debut was the 1981 release "".  The next film he directed was the science fiction action thriller "The Terminator" (1984).  It starred Arnold Schwarzenegger as the titular cyborg assassin, and was Cameron's breakthrough feature.  In 1986, he directed and wrote the science fiction action sequel "Aliens" starring Sigourney Weaver.  He followed this by directing another science fiction film "The Abyss" (1989).  In 1991, Cameron directed the sequel to "The Terminator", "" (with Schwarzenegger reprising his role), and also executive produced the action crime film "Point Break".  Three years later he directed a third Schwarzenegger-starring action film "True Lies" (1994). Michael Connell Biehn (born July 31, 1956) is an American actor, primarily known for his military roles in science fiction films directed by James Cameron; as Sgt. Kyle Reese in "The Terminator" (1984), Cpl. Dwayne Hicks in "Aliens" (1986) and Lt. Coffey in "The Abyss" (1989).  He was nominated for the Saturn Award for Best Actor for "Aliens."  His other films include "The Fan" (1981), "K2" (1991), "Tombstone" (1993), "The Rock" (1996), "" (2001) and "Planet Terror" (2007).  On television, he has appeared in "Hill Street Blues" (1984) and "Adventure Inc." (2002-03). Deepsea Challenger (DCV 1) is a 7.3 m deep-diving submersible designed to reach the bottom of Challenger Deep, the deepest-known point on Earth.  On 26 March 2012, Canadian film director James Cameron piloted the craft to accomplish this goal in the second manned dive reaching the Challenger Deep.  Built in Sydney, Australia by the research and design company Acheron Project Pty Ltd, "Deepsea Challenger" includes scientific sampling equipment and high-definition 3-D cameras, and reached the ocean's deepest point after two hours and 36 minutes of descent from the surface. James Cameron (March 1, 1800 – July 21, 1861) was a Pennsylvanian who served as colonel of the 79th New York Volunteer Infantry Regiment of the Union Army during the early days of the American Civil War (Civil War).  He was the brother of Simon Cameron, United States Senator and first United States Secretary of War in the cabinet of President Abraham Lincoln.  At the age of 61, James Cameron was killed in action at the First Battle of Bull Run, the first large battle of the war, on July 21, 1861. Expedition: Bismarck is a 2002 documentary film produced for the Discovery Channel by Andrew Wight and James Cameron, directed by James Cameron and Gary Johnstone, and narrated by Lance Henriksen.  The film follows an underwater expedition to the German battleship Bismarck and digitally reconstructs events that led up to the ship's sinking during World War II.  In 2003 the film was honored with an Emmy award for Outstanding Sound Editing for Non-Fiction Programming. The score to the 1986 James Cameron film "Aliens" was composed by James Horner.  The score itself includes musical references to Gayane's Adagio from Aram Khachaturian's "Gayane" ballet suite, which had been used in Stanley Kubrick's "" (1968).  The score also uses musical motifs, sound treatments and excerpts from Jerry Goldsmith's original soundtrack to "Alien" (1979).  Additional cues taken from Jerry Goldsmith's "Alien" score were used in the climax of the film when Horner was unable to finish some cues to Cameron's satisfaction.  The film's editors also reportedly altered the score's chronological flow, sometimes looping, truncating or removing the music and placing it in fragmented form in the film out of context.  Despite production issues, it was nominated for an Academy Award in 1986.  It was performed by the London Symphony Orchestra.  The soundtrack album was released the following year, in 1987. Mike deGruy (December 29, 1951 – February 4, 2012) was an American documentary filmmaker specialising in underwater cinematography.  His credits include "Life in the Freezer", "Trials of Life", "The Blue Planet" and "Pacific Abyss".  He was also known for his storytelling, most notably, a passionate TED talk about his love of the ocean on the Mission Blue Voyage.  His company, Film Crew Inc., specialized in underwater cinematography, filming for BBC, PBS, National Geographic, and The Discovery Channel.  His notable accomplishments include diving beneath thermal vents in both the Atlantic Ocean and Pacific Ocean.  He was a member of many deep sea expeditions and was a part of the team that first filmed the vampire squid and the nautilus.  He was also part of the Deepsea Challenge, where James Cameron went to the bottom of the Mariana Trench.  In 2016, production began on a feature-film documentary about his life and work titled Diving Deep.  The documentary is planned for release in 2017.  Additionally, Mike was well-known for his shark attack on April 2, 1978 by a grey reef shark, and was severely bitten on his lower right forearm, from which he bore scars. Aliens is a line of several comic books set in the fictional universe of the "Alien" films published by Dark Horse Comics from 1988 forward.  The stories often feature the company Weyland-Yutani and the United States Colonial Marines.  Originally intended as a sequel to James Cameron's 1986 film "Aliens", the first mini-series features the characters of Rebecca "Newt" Jorden and Corporal Dwayne Hicks.  Later series also included the further adventures of Ellen Ripley.  Other stories are completely unique to the Alien universe, and are often used to explore other aspects of the species, such as their sociology and biology.  The comics are generally considered non-canonical to the main Alien film series.
Answer: Aliens of the Deep