Time Capsule
Time Capsule, a container, storing historical documents and objects, that is to be opened at some future date. The contents, which may include newspapers, recordings, and various artifacts, are intended to reveal something about contemporary civilization to future generations. A capsule is often prepared to commemorate a notable event, such as the dedication of a new building or the opening of a world's fair. It is generally sealed in a building cornerstone or buried in the ground.