Introduction : the time capsule experience -- Time capsule milestones in world chronology -- How time capsules work -- Notional and archaeological time capsules -- The time capsule's ancient origins and modern transformations -- The golden age of the grand time capsules, 1935-1982 -- Writing down the ages : ancient writings from yesterday, today, and tomorrow as time capsule experiences -- Keeping time in a perpetual futurescape -- Epilogue : our ideal time capsule