Are portals to another dimension theoretically possible?

Anything is possible as long as the environment in which the phenomena you are attempting to create allows for it

>>16723506 (OP) https://www.etymonline.com/word/dimension

>>16723508
Anything is possible. Your only limitation is your system of belief.

>>16723506 (OP)
What do you think LSD is?

>>16723506 (OP)
What do you mean portal to another dimension?
Time is a dimension....what is a portal to time??

>>16723506 (OP)
>Carve a hole in bathroom stall.
>Insert penis.
>Penisnow in the pleasure dimension.

Just try not to think too hard about what's on the other side.

>>16723506 (OP)
They're not what you expect.

>>16723743
dimension is another word for universe

If another dimension was accessible, whether by a portal or otherwise, it would by definition be the same dimension that you were already in

>>16723506 (OP)
>portals to another dimension
we have those it's called DMT

>>16723506 (OP)
Popular media really plays it fast and loose with the definition of "dimension"
In the Half-Life series, almost every usage of the word "dimension" is actually referring to an entire different "universe" per Many Worlds Theory (which in Half-Life canon is treated as demonstrable fact).

>>16723508
In other words, according to your worldview everything that the environment doesn't allow for is impossible.
So OP is asking does the environment allow for interdimensional portals?

>>16723743
Usually people mean orthogonal dimensions of spacetime, not just accessing a new temporal dimensions although there are theories that multiple temporal dimensions exist.

>>16723893
no those would be pocket dimensions

>>16723506 (OP)
You can create a portal to a pocket dimension by putting smaller Aperture Science portal into bigger portal:
https://www.youtube.com/watch?v=IhEaw3Kuhf0
https://www.youtube.com/watch?v=1UsAqvooYj4