The digital era brought with it the promise of indefinite memory. Increased computing power and disk space combined with decreasing costs were supposed to make anything born digital possible to store for ever. But digital data often has a surprisingly short life. “If we’re not careful, we will know more about the beginning of the 20th century than the beginning of the 21st century,” says Adam Farquhar, who is in charge the British Library’s digital-preservation efforts. (via Digital archiving: History flushed | The Economist)