I have already discussed earlier why we need to go into deep space if we want to have a future as a specie. But the problem is how to do it? Until now, this was considered impossible.
A first theoretical step had been made, with the Alcubierre drive, an interesting solution to the equations of general relativity that would allow a section of space to move faster than light, although what is inside would not feel acceleration. The solution can be interpreted as moving space rather than matter. But until recently, it was considered as impossible in practice because of the amount of energy required.
This is apparently changing, and work in that field seems to have advanced a lot faster than I anticipated. Here is a video from people working on it, complete with artistic renderings of what the ships might look like:
Now I only need to reconcile that work with my own pet theory and see where that leads me 🙂
By the way, I talk about this later because I saw this through an article about another interesting step in space engine technology, an electromagnetic drive that appears to be working in a vacuum, something which was until now considered hard to believe.