How would you make the portal? What would it look like? How would it work? How is it possible? Would it be like a

Question: How would you make the portal? What would it look like? How would it work? How is it possible? Would it be like a wormhole?
- Keywords:
  portal,
  wormhole
Asked by Little Einsteins to Jarrod on 12 Jun 2016. This question was also asked by tjmagee, 587kgrf49.
- Jarrod Hart answered on 12 Jun 2016:
  
  Well, um, the mentoring ‘portal’ I would love to see working is just a website on which prospective engineers could find engineers to mentor them – but I doubt that is the portal you’re interested in!
  
  I guess nowadays the word ‘portal’ has been hijacked by sci-fi to mean, as you say, a wormhole, rather than it’s original definition which is more-or-less just ‘gateway’…
  
  As for wormholes, I don’t actually believe in wormholes between places in the universe, but I do believe there can be wormholes into the distant future!
  
  All you need is a lot of mass – a heck of a lot – it will densify the gravitational field nearby and make time flow faster (than for an outside observer) potentially much faster -such that if you do a ‘fly-by’ a million years might pass in just a few hours – the trouble is, such big masses tend to suck everything in (they become black holes) so you need to be careful and not go too close!!

Question: How would you make the portal? What would it look like? How would it work? How is it possible? Would it be like a wormhole?