Background
Time capsules are placed with the intention that they will be opened or accessed at a future date. The 1939 New York World's Fair time capsule was created by Westinghouse as part of their exhibit. It was 90 inches (2.3 metres) long, with an interior diameter of 6.5 inches (16 cm), and weighed 800 pounds (360 kg). Westinghouse named the copper, chromium and silver alloy "Cupaloy", claiming it had the same strength as mild steel. It contained everyday items such as a spool of thread and doll, a Book of Record (description of the capsule and its creators), a vial of staple food crop seeds, a microscope and a 15-minute RKO Pathé Pictures newsreel. Microfilm spools condensed the contents of a Sears Roebuck catalog, dictionary, almanac, and other texts. This first modern time capsule was followed in 1965 by a second capsule at the same site, but 10 feet to the north of the original. Both capsules are buried 50 feet below Flushing Meadows Park, site of the Fair. Both the 1939 and 1965 Westinghouse Time Capsules are meant to be opened in 6939. More recently, in 1985, Westinghouse created a smaller, Plexiglass shell to be buried beneath the New York Marriott Marquis hotel, in the heart of New York's theater district. However, this time capsule was never put in place.
The Crypt of Civilization (1936) at Oglethorpe University, intended to be opened in 8113, is generally regarded as the first modern time capsule, although it was not called one at the time. George Edward Pendray is responsible for coining the term "time capsule." During the socialist period in the USSR, many time capsules were buried with messages to a future communist society. New Zealand developed a time capsule project called "Millennium Vault" for the turn of the 20th century. The project developers buried it beneath a pyramid.
Currently, four time capsules are "buried" in space. The two Pioneer Plaques and the two Voyager Golden Records have been attached to spacecraft for the possible benefit of spacefarers in the distant future. A fifth time capsule, the KEO satellite, will be launched in 2012, carrying individual messages from Earth's inhabitants addressed to earthlings around the year 52,000, when it is due to return to Earth. The International Time Capsule Society was created to maintain a global database of all existing time capsules.
It is widely debated when time capsules were first used but current evidence shows it was used as early as 1876, however the principle is fairly simple and the idea and first use of time capsules could be much older than we currently know.
Read more about this topic: Time Capsule
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