You have carefully prepared a time capsule, chosen the perfect objects, found the ideal spot to bury it. Statistically, there is an 80% chance that no one will ever find it again. This striking figure comes from the International Time Capsule Society (ITCS), founded in 1990 at Oglethorpe University in Brookhaven, Georgia (USA), by Paul Hudson and Knott Hudson. The ITCS was created to celebrate the 50th anniversary of the closure of the Crypt of Civilization and set itself the mission of documenting and studying time capsules around the world.
This 80% loss rate is not just an anecdotal detail. It reveals a fascinating paradox: we create time capsules to preserve memories, but the very mechanism of their preservation is fundamentally fragile. Understanding why capsules get lost is also understanding how to avoid this fate.
The Landscape Changes, Landmarks Disappear
The first cause of time capsule loss is the physical transformation of the environment. The world we know changes constantly: buildings are demolished, parks are redesigned, roads are built where gardens used to be, entire neighborhoods are rebuilt within a few decades.
The story of Steve Jobs's capsule in Aspen is a striking example. In June 1983, during the International Design Conference, Jobs and other participants buried a 4-meter-long "Time Tube" containing an Apple Lisa mouse, an 8-track recording by the Moody Blues, a Rubik's Cube, and other objects typical of the early 1980s. The capsule was meant to be opened in the year 2000. But the Aspen landscape had changed so much in 17 years that no one could find the exact location. The tube remained lost for over 30 years, until the team from National Geographic Channel's "Diggers" show discovered it in 2013, thanks to original topographic coordinates found in archives. Steve Jobs, who passed away in October 2011, never knew his capsule had been found.
Another revealing case: in 1963, General Dynamics Astronautics placed a capsule in a concrete safe for the company's 5th anniversary. When the building was demolished in the 1990s, no one among the demolition crews was aware of the capsule's existence. It is presumed destroyed along with the building's rubble.
The lesson is clear: a location that seems permanent today — a park, a building, a cornerstone — can vanish within a generation.
Collective Memory Fades: The Human Problem
The second major cause of loss is pure and simple forgetting. The people who know where the capsule is located move, age, and pass away. Documents are lost in moves or administrative reorganizations. Institutions change leadership and priorities.
The most infamously famous example is that of Wilkinsburg, Pennsylvania. In 1962, a special committee was formed to bury a time capsule. To protect the contents, the exact location was kept secret, known only to the committee members. The idea was commendable, but the result was disastrous. When it was time to dig up the capsule for the city's 100th anniversary in 1987, 25 years later, almost all of the committee members had died. The sole survivor, despite his efforts, could no longer remember the exact location. The capsule is still lost somewhere beneath the city, probably forever.
This problem is so widespread that the ITCS now recommends documenting a capsule's location in at least three independent sources: municipal or institutional archives, a local newspaper, and the personal documents of several people involved. They also recommend engraving the location on a visible plaque installed nearby, with the planned opening date. But even these precautions guarantee nothing over a period of several decades.
Historian William Jarvis, in his reference work "Time Capsules: A Cultural History" (2002), notes that most capsules created by individuals or small organizations are lost in less than 30 years, simply because institutional memory does not survive changes in personnel and generations.
The Invisible Enemy: Water and the Elements
Water is the number one enemy of physical time capsules. Groundwater, ambient humidity, condensation inside the container, flooding — everything conspires to destroy the contents of buried capsules, even those that seem well protected.
At the Michigan State Capitol, a capsule buried in 1879 under the building's cornerstone was opened for the centennial. The celebrants, who expected to find valuable historical documents, discovered what witnesses described as a "box full of mush": water infiltration over a century had destroyed all the paper documents, transforming them into an indecipherable mass. Only a few metal coins survived the test of time and water.
This case is far from isolated. Museum and archive conservation experts estimate that the majority of buried time capsules suffer water damage, even those protected by metal containers that seem robust. Corrosion (even stainless steel corrodes under certain soil conditions), freeze-thaw cycles that create microcracks, and ground movement from earthquakes or natural settling eventually compromise the watertightness of nearly all containers over periods of a few decades.
Beyond water, other natural threats exist: insects and rodents that penetrate compromised containers, fungi and mold that develop in humid environments, and temperature variations that degrade organic materials like paper, leather, and fabric.
The verdict from conservation professionals is unequivocal: burying an object in the ground is literally one of the worst ways to preserve something for future generations. Underground conditions — high humidity, variable temperature, presence of microorganisms — are the exact opposite of what archival conservation standards recommend (stable temperature around 18-20 degrees Celsius, relative humidity of 30-40%, absence of light).
Capsules Forgotten in Buildings
Not all lost capsules are buried in the ground. Many are placed in the cornerstones of buildings, in walls or foundations, and are forgotten when the building is renovated or demolished without anyone remembering their presence.
In Washington State, in 1953, one of two time capsules planned to celebrate the territory's centennial was inexplicably left in a storage room on the 5th floor of the State Capitol, tucked in a crate among other ordinary crates. It was not found until after an earthquake damaged the building in 2001, nearly 50 years later, during the damage inspection.
Other capsules are discovered by pure chance during renovation work. In November 2017, restorers working on a wooden statue of Jesus Christ in Burgos, Spain, found a capsule hidden inside the statue, containing a handwritten document by chaplain Joaquin Minguez from 1777. This 240-year-old message, describing the economic and social life of the era, had crossed the centuries thanks to the unintentional protection provided by the statue's wood.
How to Protect a Physical Capsule: Expert Recommendations
The U.S. Library of Congress has published detailed recommendations for those who wish to create a physical capsule. Their main advice: use a hermetic container made of polyethylene (PET) or high-quality stainless steel; store the capsule in a dry, cool, and accessible place — not in the ground; handle objects with cotton gloves to avoid transferring oils and acids; use exclusively acid-free paper and archival ink; create a detailed inventory of the contents, kept in duplicate at a separate location; and designate an official guardian responsible for the capsule and for transmitting that responsibility.
The ITCS adds several pragmatic recommendations: do not choose too long a waiting period (the longer the period, the more the risk of loss increases exponentially); register the capsule with the ITCS itself to maintain a central registry; plan a public opening event to create community engagement that strengthens collective memory; and above all, never keep the location secret.
The Digital Solution: Zero Risk of Physical Loss
Faced with all these challenges, digital time capsules offer an alternative that radically eliminates most causes of loss: no water infiltration, no building demolition, no forgetful committee, no changing landscape, no rodents, no corrosion. The message is stored in the cloud, replicated across multiple servers in different geographic regions, and delivered automatically on the planned date, without human intervention.
With Capsul, your capsule will not be among the 80% that disappear. It will arrive at its destination, on the chosen date, without depending on anyone's memory.
Sources
- International Time Capsule Society (ITCS), Oglethorpe University, Brookhaven, Georgia - Library of Congress, "Time Capsule Tips," loc.gov - Jarvis, William E., "Time Capsules: A Cultural History," McFarland & Company, 2002 - National Geographic Channel, "Diggers" show, season 3, 2013