A time capsule is a historic cache of goods or information, usually intended as a deliberate method of communication with future people, and to help future archaeologists, anthropologists, or historians. The preservation of holy relics dates back for millennia, but the practice of preparing and preserving a collection of everyday artifacts and messages to the future appears to be a more recent practice. Time capsules are sometimes created and buried during celebrations such as a world's fair, a cornerstone laying for a building, or at other ceremonies.

Knowing is a 2009 American science fiction thriller film directed and co-produced by Alex Proyas and starring Nicolas Cage. The film, conceived and co-written by Ryne Douglas Pearson, was originally attached to a number of directors under Columbia Pictures, but it was placed in turnaround and eventually picked up by Escape Artists. Production was financially backed by Summit Entertainment. Knowing was filmed in Docklands Studios Melbourne, Australia, using various locations to represent the film's Boston-area setting. The film centers on the discovery of a strange paper filled with numbers and the possibility that they somehow predict the details of various disasters culminating in the apocalypse.