Electric lamps, rotating beacons, and remote monitoring removed keepers from the towers one by one over a century, turning a respected maritime job into a symbol of what automation erases.
A 15th-century book written in an unknown script and filled with botanical and astronomical illustrations has resisted linguists, cryptographers, and machine translation for well over a century.
A bronze geared computer recovered from an ancient Greek shipwreck predicted eclipses and tracked the calendar, showing how far ahead ancient science ran and how easily that knowledge was lost.