A Wrinkle in Time is a science fantasy novel by Madeleine L'Engle, first published in 1962. The story revolves around a young girl whose father, a government scientist, has gone missing after working on a mysterious project called a tesseract. The book won a Newbery Medal, Sequoyah Book Award, and Lewis Carroll Shelf Award, and was runner-up for the Hans Christian Andersen Award. It is the first in L'Engle's series of books about the Murry and O'Keefe families.

The book was written between 1959 and 1960. L'Engle has written repeatedly about the writing of the story and the long struggle to get it published. In A Circle of Quiet (1972, ISBN 0-374-12374-8), she explains that the book was conceived "during a time of transition". After years of living at Crosswicks and running a general store, L'Engle's family, the Franklins, moved back to New York City, first taking a ten-week camping trip across the country and back again. L'Engle writes that "we drove through a world of deserts and buttes and leafless mountains, wholly new and alien to me. And suddenly into my mind came the names, Mrs Whatsit. Mrs Who. Mrs Which." This was in the spring of 1959. L'Engle was reading about quantum physics at the time, which also made its way into the story. However, when she completed the book in early 1960, it was rejected by at least 26 publishers, because it was, in L'Engle's words, "too different", and "because it deals overtly with the problem of evil, and it was too difficult for children, and was it a children's or an adults' book, anyhow?"

In Time (previously titled Now and I'm.mortal) is a 2011 American dystopian science fiction action film starring Justin Timberlake, Amanda Seyfried, Cillian Murphy, Olivia Wilde, Alex Pettyfer, Johnny Galecki, and Vincent Kartheiser. The film, written, directed and produced by Andrew Niccol, was released on October 28, 2011. Met with mixed critical reviews, it performed well at the box office.

By 2161, genetic alteration has allowed humanity to stop aging at 25 but people are required to earn more time after turning 25 or die when their accumulated time runs out. 'Living time', which can be transferred among individuals on body-contact, has replaced money and its availability is displayed on an implant on people's lower arm. When that clock reaches zero, one dies instantly. Society is divided by social class living in specialized towns called 'Time Zones'. The poor live in the ghettos of Dayton, where youth predominates, and must work each day to earn a few more hours of life, which they must also use to pay for everyday necessities. The rich live in the luxurious city-like town called New Greenwich, in which the middle-aged and elderly predominate, though they look young because they have stopped aging at 25 years old. They drive fast electric cars, and can live for centuries.