Marvel has featured Spider-Man in several comic book series, the first and longest-lasting of which is The Amazing Spider-Man. Over the years, the Peter Parker character developed from a shy, nerdy New York City high school student to troubled but outgoing college student, to married high school teacher to, in the late 2000s, a single freelance photographer. In the 2010s, he joins the Avengers, Marvel's flagship superhero team. Spider-Man's nemesis Doctor Octopus also took on the identity for a story arc spanning 2012–2014, following a body swap plot in which Peter appears to die. Marvel has also published books featuring alternate versions of Spider-Man, including Spider-Man 2099, which features the adventures of Miguel O'Hara, the Spider-Man of the future; Ultimate Spider-Man, which features the adventures of a teenaged Peter Parker in an alternate universe; and Ultimate Comics Spider-Man, which depicts the teenager Miles Morales, who takes up the mantle of Spider-Man after Ultimate Peter Parker's supposed death. Miles is later brought into mainstream continuity, where he works alongside Peter.
For Spider-Man, what begins as a quiet patrol turns into a life-and-death struggle against two of his deadliest enemies--Lizard and Morbius, the Living Vampire. Both villains are after Eileen McKay, a scientist whose experiments could either cure Morbius of his vampire curse, or help Lizard create an army of humanoid reptiles to take over the world. Trapped between a savage Lizard and a bloodthirsty Morbius, Spidey is in for the fight of his life!
The cowl's basic design has remained unchanged; however, it has been frequently updated to advance Batman's crusade. The one aspect of the cowl that does undergo variations is the ears, although the length and pointiness of the ears are supposedly primarily due to the style of the artist drawing Batman, and tends not to be tied to the functionality of the cowl in any way. However, artist, Karl Kerchl has drawn Batman's costume vault showing that he has a wide selection of cowls with ears of different lengths (Adventures of Superman #643).
Halloween costumes are costumes worn on or around Halloween, a festival which falls on October 31. An early reference to wearing costumes at Halloween comes from Scotland in 1585, but they may pre-date this. There are many references to the custom during the 18th and 19th centuries in the Celtic countries of Scotland, Ireland, Mann and Wales. It has been suggested that the custom comes from the Celtic festivals of Samhain and Calan Gaeaf, or from the practise of "souling" during the Christian observance of Allhallowtide. Wearing costumes and mumming has long been associated with festivals at other times of the year, such as on Christmas. Halloween costumes are traditionally based on frightening supernatural or folkloric beings. However, by the 1930s costumes based on characters in mass media such as film, literature, and radio were popular. Halloween costumes have tended to be worn mainly by young people, but since the mid-20th century they have been increasingly worn by adults also.