Portals haven't been created yet. Not by man, at least. There is a possibility that black holes could be a sort of portal. I don't know, I'm not a meteorologist.
The sequel to spectrobes, a ds game, made by Disney
Over time the portals will be fixed and new ones found. To update portals you MUST have Internet connection and download the portals. Buy characters to enter portals.
Portals to Uphobia was created in 2004.
Portals of Tomorrow was created in 1954.
Portals of Tomorrow has 371 pages.
Portals of Grace was created on 2002-07-30.
Portals Athletic F.C. ended in 1987.
Portals - album - was created on 2009-07-14.
Portals may serve a variety of purposes, depending on the world/series/game in which they exist. Often portals are used to travel quickly from one world/place to another. Sometimes portals also enable time travel.
Portals made from black holes are highly speculative. You are more likely to encounter such portals (usually called wormholes) in science fiction (because it suits the plot), than in serious astronomical literature.
all portals are 5 blocks by 4 blocks. If you saw a very big portal, then the person who made it hacked by inventory editing and got the portals blocks and just putting them on top of each other
Go to Malik and through the portals that are spinning left.