Volcanoes display the awesome power of Nature like few other events. Earlier this year, ash from an Icelandic volcano disrupted air travel throughout much of northern Europe. Yet this recent eruption pales next to the fury of Jupiter's moon Io, the most volcanic body in our solar system.
If volcanic activity can be observed, then it's not much of a stretch that any large scale industrial/technological activity could be observed as well. To read the rest of the article, click here.