A nonpartisan organization established by the U.S. Congress, "America250," buried a stainless steel time capsule weighing approximately 400 kilograms in Philadelphia's Independence National Historical Park on July 4th, the 250th anniversary of the founding of the United States. It is scheduled to be opened in 2276, on the 500th anniversary of the nation's founding. The sealed items include a prediction from AI chatbot Claude about California's appearance 250 years from now.
Time Capsule Specifications and Burial Location: Independence National Historical Park, Philadelphia
The time capsule is a stainless steel cylindrical container weighing about 400 kilograms, jointly created by NIST scientists, the National Park Service, and storage experts from the Library of Congress. The engineering goal is to ensure the container remains intact underground for 250 years.
The burial site is Independence National Historical Park in Philadelphia, Pennsylvania, the historic location where the Declaration of Independence was signed in 1776. The burial date is July 4, 2026, the 250th anniversary of U.S. independence, with a scheduled opening on the 500th anniversary of U.S. independence in 2276.
List of Sealed Items: Natural Symbols, Historical Artifacts, and Contemporary Pop Culture Objects
The items sealed in this time capsule span three major categories:
Natural Symbols: Wisconsin provides a brown feather from a bald eagle named after Lincoln; Maine contributes a piece of whale bone.
Historical and Technological Artifacts: Ohio sends a small piece of fabric from the 1903 Wright Brothers' airplane wing; the Library of Congress provides a small metal bottle containing synthetic DNA (a "molecular data storage device"), with DNA encoding the draft of the Declaration of Independence handwritten by Jefferson and the lyrics of the U.S. national anthem "The Star-Spangled Banner" handwritten by Francis Scott Key; a pocket-sized U.S. Constitution signed by Supreme Court justices.
Contemporary Pop Culture Objects: An orange iPhone 17 Pro Max (selected by America250); a classic Coca-Cola glass bottle; the New Year's Eve Times Square ball crystal from 2026; a commemorative coin co-branded by the NFL and America250; a small hand-held flag from the Rose Parade; a 2025 NBA championship commemorative pin from the Oklahoma City Thunder; an Arkansas diamond; a handmade bookmark from the Wabanaki Confederacy of Native American tribes; a recipe for New Mexico anise cookies.
California's Special Contribution: AI Claude replaces a physical object, answering "California 250 years later."
California's selection is the most unique among all states: It did not submit any physical objects but instead sealed a response from the AI chatbot Claude. Researchers asked Claude what California would look like 250 years from July 4, 2026, and sealed its answer as California's time capsule record. This is the only object in the time capsule represented by AI-generated content, also making this sealing a historical snapshot of the state of AI development in 2026.
Frequently Asked Questions
Where is the time capsule buried, and when will it be opened?
According to America250's announcement, the time capsule was buried on July 4, 2026, the 250th anniversary of U.S. independence, in Independence National Historical Park in Philadelphia, Pennsylvania. It is scheduled to be officially opened in 2276, on the 500th anniversary of U.S. independence; the coordination is led by America250, a nonpartisan organization established by the U.S. Congress.
What are the most technologically significant items in the time capsule?
According to reports, the most technologically representative items include: the "molecular data storage device" provided by the Library of Congress — a small metal bottle containing synthetic DNA, with DNA encoding digital copies of the Declaration of Independence draft and the manuscript of the U.S. national anthem; an orange iPhone 17 Pro Max, symbolizing the forefront of mobile technology in the U.S. in 2026; and a text prediction from AI chatbot Claude about California's appearance 250 years from now.
Are there other time capsules in the U.S.?
According to reports, another time capsule is being prepared in Washington, D.C., also scheduled to be opened in 2276 on the 500th anniversary of U.S. independence; the contents of the D.C. capsule have not been disclosed publicly, meaning that in 2276 Americans will open two sealed items from the 21st century simultaneously.
