As Twitter to blogging, so a civilisation advances and broadcast radio fades to fibre-optic silence

[aesmael]

Considered a shortening of detectable lifespan as even without some 'ending', cataclysm or otherwise, the brief flowering of unsecured noise at length becomes brief, directed, secure communication, no longer of a sort we might stumble upon in searches from a distance.

Thus is the sky silent.

Comments

[pazi-ashfeather.livejournal.com]

Thus does a lucky civilization narrowly avoid detection by the Ur-Quan Kohr-Ah.