universetoday.com
Astronomy Without A Telescope - Alien Mining
[/caption] Recently, some researchers speculated on what types of observational data from distant planetary systems might indicate the presence of an alien civilization, determined that asteroid mining was likely to be worth looking for – but ended up concluding that most of the effects of such activity would be difficult to distinguish from natural phenomena. … Continue reading "Astronomy Without A Telescope – Alien Mining"
Steve Nerlich