Of course it is possible, based on the General Theory of Relativity. I dont think scientists in general say that it is impossible.
What is impossible for us AT THIS TIME is for our society to travel at light speed, because we do not have the technology
As far as Extra Terrestrial life on another planet, especially if that planet is in a neighboring galaxy it is still going to take them a million or
so light years.
Here is a list of estimated galxy distances for you to ponder on notice that these galaxies are listed in (ly) Light Years and are a guess by people
that are smarter than me (when it comes to cosmology)
1. Milky Way Galaxy - home galaxy of Earth
2. Canis Major Dwarf Galaxy - 25,000 ly (satellite of Milky Way)
3. Sagittarius Dwarf - 81,000 ly (satellite of Milky Way)
4. Large Magellanic Cloud - 160,000 ly (satellite of Milky Way)
5. Small Magellanic Cloud - 190,000 ly (satellite of Milky Way)
6. Ursa Minor Dwarf - 205,500 ly (satellite of Milky Way)
7. Draco Dwarf - 248,000 ly (satellite of Milky Way)
8. Sculptor Dwarf - 254,000 ly (satellite of Milky Way)
9. Sextans Dwarf - 257,500 ly (satellite of Milky Way)
10. Carina Dwarf - 283,500 ly (satellite of Milky Way)
11. Fornax Dwarf - 427,000 ly (satellite of Milky Way)
12. Leo II - 701,000 ly
13. Leo I - 890,000 ly
14. Phoenix Dwarf - 1,271,000 ly
15. Barnards Galaxy (NGC 6822) - 1,760,000 ly
16. NGC185 - 2,021,000 ly (satellite of Andromeda)
17. NGC147 - 2,152,000 ly (satellite of Andromeda)
18. Andromeda Galaxy (M31) - 2,363,000 ly
19. M32 (NGS 221) - 2,363,500 ly (satellite of Andromeda)
20. M110 (NGC 205) - 2,363,500 ly (satellite of Andromeda)
21. Andromeda I - 2,363,500 ly (satellite of Andromeda)
22. Andromeda II - 2,363,500 ly (satellite of Andromeda)
23. Andromeda III - 2,363,500 ly (satellite of Andromeda)
24. LGS 3 - 2,477,500 ly (satellite of Triangulum)
25. IC 1613 - 2,494,000 ly
26. Triangulum Galaxy (M33) - 2,592,000 ly
27. Aquarius Dwarf - 2,608,000 ly
28. Tucana Dwarf - 2,836,000 ly
29. Wolf-Lundmark-Melotte (WLM) - 3,064,500 ly
Now this list from what I understand changes all the time, but from the 1 listing it would still take 25,000 ly to get here. Round trip estimation A
LONG TIME.
I also believe bending space time, the Einstein-Rosen Bridge and many elements of quantum mechanics are a way you could circumvent these times but
once again no evidence of negative matter has been revealed to our society....that we know of....so it would be impossible to sustain the bending of
or the bridge for these theories to work.
So far the article that I saw restates the argument for but with no real evidence which to me still makes this a big hypothesis



