Sadly, I do not know.

No they wouldn't because it would be in the dome. Otherwise, they would need to acquire new carbon dioxide whenever they used it to produce electricity.

I do not know why current planes aren't being upgraded but my guess would be that the technology is so old that upgrading it would actually cost more than building new planes altogether.

We can convert CO2 into energy. But first, you need to plant a lot of trees and wait about 20 - 50 years. :)

Nuclear pulse propulsion is certainly interesting, but it would face the same problems nuclear energy itself faces - it sounds scary and honestly would only be useful once in space for the most part because

Solar will honestly need to move to space one day but we first need to develop a technology that will allow for cheap and most importantly safe transfer of energy over such a large distance. But the bigger

Well, you might be surprised but I myself am a big fan of nuclear power, and of the reasons why I think that for the time being it is the best source of energy for humanity is the fact that it doesn't

It's so new it will require research to find practical uses. But for the time being it is used to research alpha decay as written in the article :)

Well, that's of course possible and certainly scary.

I think you are being a bit too optimistic when it comes to close contact with aliens. There would be probably years worth of research on whether such contact would be safe done from both sides as any

Viruses only truly work when you take physical (or close) contact into consideration. Civilizations could also talk over huge distances so viruses would never have a chance to spread. Also, even meeting

I don't personally believe it either. To be honest, I don't think either of the solutions are correct on themselves, more likely each of them playing a bit of a role in the final equation. Or, we just

Well, neither do the scientists know as that's the problem with it. It doesn't fit our current theories about black holes. And yes, it was detected thanks to its effect on its stellar partner.

There's still the Alcubierre drive which is mostly used when talking about FTL speeds, but honestly many forget it could also be used just for faster traveling at non-FTL speeds. But that one is also just

I don't think we will ever be able to use the full amount of energy and I even think that would be counterproductive as it would have to fully absorb the radiowaves blocking them from reaching your devices.