So there's no doubt that the economy, and perceptions of how it could be affected by independent nationhood, is going to play big in the next two years of campaigning - at least as big as questions of identity and calls on Braveheart patriotism.

BBC: Scottish independence: Braveheart or iPad?

But unless he can persuade Americans that he cares about debt and knows how to shrink it, Mr Obama's future electoral prospects could be on the line too.

BBC: Analysis: Obama's deficit dilemma

It makes some sense that public content could be used by others, but it's easy to forget how public "Public" on an Internet service is.

CNN: SHARE THIS

It's an incredibly fluid and intuitive experience that doesn't require any know-how, and could be executed flawlessly by even the most severe Luddite.

ENGADGET: Sony Xperia Ion review: an Android handset with a split personality

"The main damage in the investor's mind is the increasing uncertainty, " he said, noting that it isn't known how strongly Andalusia's decree will be enforced and what other measures regional governments could come up with that could affect the market.

WSJ: Spain Region Upsets Asset-Sale Plan

Given that some large-scale experiments could bring adverse impacts, how are they to be overseen - even if it's agreed that they should happen?

BBC: Science & Environment