The Fascinating World of Time Capsules

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Helium Centennial Time Capsule 

This structure, which was built in 1968 to commemorate the discovery of helium, contains four-time capsules.

Interestingly enough, the capsule’s creators stored a passbook for a savings account in one capsule. They put $10 in it originally, and it’s been collecting 4 percent interest a year, so in 1,000 years, it’ll be worth over a quadrillion dollar (that’s not an exaggeration; it’ll actually be worth around $1,000,000,000,000,000). At least, assuming our government and economy don’t change substantially over the next 1,000 years. This structure is situated by the Don Harrington Discovery Centre.