Question: Which of the following speculates what might become of Earth should humanity instantly disappear: Life After People or The Vanishing Prairie?

Context articles: Allen Walker
Life After People
True-Life Adventures
The Vanishing Prairie
Extraterrestrial life
Health (gaming)
Cosmic ancestry
Joshua ben Hananiah
Shadow life
Niles Canyon ghost

Allen Walker (Japanese: アレン・ウォーカー , Hepburn: Aren Wōkā ) is the fictional protagonist of the manga series "D.Gray-man", created by Japanese artist and writer Katsura Hoshino.
 In the series, set on 19th-century Earth, Walker is a teenager who joins the Black Order (a group of soldiers known as Exorcists).
 As an Exorcist, Allen uses a mysterious object (Innocence) to fight the demons known as Akuma.
 Allen's Innocence, which initially assumes the form of a giant left arm, evolves to give him new abilities.
 Allen uses these powers to fight the Millennium Earl (who created an army of Akuma to destroy the world) and his superhuman followers, the Noah Family.
 He learns that he is connected to the Noah, and might become one of them.
Life After People is a television series on which scientists, structural engineers, and other experts speculate about what might become of Earth should humanity instantly disappear.
 The featured experts also talk about the impact of human absence on the environment and the vestiges of civilization thus left behind.
 The series was preceded by a two-hour special that aired on January 21, 2008 on the History Channel which served as a de facto pilot for the series that premiered April 21, 2009.
 The documentary and subsequent series were both narrated by James Lurie.
True-Life Adventures series is a collection of fourteen full length and short subject documentary films produced by Walt Disney Productions roughly between the years 1948 and 1960.
 The series won eight Academy Awards for the studio including three Academy Award for Best Documentary Feature awards for "The Living Desert", "The Vanishing Prairie" and "White Wilderness", and five Best Two Reel Live Action Short awards for "Seal Island", "In Beaver Valley", "Nature's Half Acre", "Water Birds", and "Bear Country".
 It inspired a daily panel comic strip that was distributed from 1955 to 1971 and drawn by George Wheeler.
 Several of the films were adapted in comic book format as one shots in the Dell Comics Four Color series.
 The films were among the earliest production experience for Roy E. Disney.
 Also this film series was the launching pad for Disney's new distributor, Buena Vista International.
 TV episodes are from Disney's anthology TV series.
The Vanishing Prairie is a 1954 documentary film released by Walt Disney Productions.
Extraterrestrial life, also called alien life (or, if it is a sentient or relatively complex individual, an "extraterrestrial" or "alien"), is life that does not originate from Earth.
 These hypothetical life forms may range from simple prokaryotes to beings with civilizations far more advanced than humanity.
 The Drake equation speculates about the existence of intelligent life elsewhere in the universe.
 The science of extraterrestrial life in all its forms is known as exobiology.
Health or vitality is an attribute assigned to entities within a role-playing or video game that indicates its state in combat.
 Health is usually measured in hit points or health points, shortened to HP.
 When the HP of a player character reaches zero, the player may lose a life or their character might become incapacitated or die.
 When the HP of an enemy reaches zero, the player might be rewarded in some way.
Cosmic ancestry is a hypothesis of the origin of life on Earth, based on the panspermia views of Fred Hoyle and Chandra Wickramasinghe.
 Cosmic Ancestry speculates that life, like the universe itself, has no date of origin, and has always existed and can only descend from ancestors at least as highly evolved as itself.
 Under this belief, life on Earth was delivered from space.
 This belief stands in stark contrast to the theory accepted by most cosmologists that the age of the universe is roughly 13.8 billion years, and that sufficient evidence is not available to presume whether life exists outside the Earth, let alone the age of that life.
Joshua ben Hananiah (Hebrew: יהושע בן חנניה‎ d. 131 CE) was a leading tanna of the first half-century following the destruction of the Temple.
 He was of Levitical descent (Ma'as.
 Sh.
 v. 9), and served in the sanctuary as a member of the class of singers (Arakhin 11b).
 His mother intended him for a life of study, and, as an older contemporary, Dosa ben Harkinas, relates (Jerusalem Talmud Yevamot 3a), she carried the child in his cradle into the synagogue, so that his ears might become accustomed to the sounds of the words of the Torah.
 It was probably with reference to his pious mother that Johanan ben Zakai thus expressed himself concerning Joshua ben Hananiah: "Hail to thee who gave him birth" (Pirkei Avot ii.
 8).
 According to another tradition (Avot of Rabbi Natan xiv.)
 Johanan ben Zakai praised him in the words from Ecclesiastes iv.
 12: "And a threefold cord is not quickly broken."
 Perhaps he meant that in Joshua the three branches of traditional learning, Midrash, Halakah, and Aggadah, were united in a firm whole; or possibly he used the passage in the sense in which it was employed later (Ecclesiastes Rabbah iv.
 14; Bava Batra 59a), to show that Joshua belonged to a family of scholars even to the third generation.
 He is the seventh most frequently mentioned sage in the Mishnah.
Shadow life is a hypothesis proposed by cosmologist Paul Davies, chair of the SETI: Post-Detection Science and Technology Taskgroup of the International Academy of Astronautics.
 The theory suggests that if life has evolved on Earth more than once, microorganisms may exist on Earth which have no evolutionary connection with any other known form of life.
 He thinks that if scientists discover an alternate form of microbial life on Earth, the odds are good that life is also common elsewhere in the universe.
 He suggests that possible indicators could be alternate biochemistries such as right-handed amino acids, or a different genetic code, or even another kind of chemical for its genetic material that are not nucleic acids (DNA nor RNA) chains or biopolymers.
 The hypothesis speculates that the descendants of any "second genesis" may have survived until today in a shadow biosphere.
The Niles Canyon ghost story is the Northern California variation on the vanishing hitchhiker archetype.
 There are many different variations of this story depending on whom you ask.
 All stories include a girl being involved in some sort of motorized vehicle accident on February 26 (year often changed).
 One variation of the story includes a girl being involved in a car crash on Niles Canyon road (off the 680 freeway in Sunol, California) on the way to her prom.
 The girl died on impact and to this day is said to haunt Niles Canyon road every February 26.
 The tale of the haunting goes that people traveling along Niles Canyon road (now Highway 84) on the night of February 26 will see a normal-looking high school-aged girl walking along the road in a prom dress (many people have said it is white).
 People traveling along the road (mostly those traveling alone) have said to have stopped and offered the girl a ride.
 She accepts the ride, giving the driver an address across the bridge (either Dumbarton or Bay Bridge depending on the storyteller).
 Once the driver gets to the beginning of the bridge, the girl will disappear.
 Sometimes people have gone to the address to find that a girl many years ago matching that description once lived there.
 Today, many people will travel along this treacherous pitch black road in the hopes of catching a glimpse of the Niles Canyon ghost.