[Pseudoscience-is-malarkey (OP)]

If penguins were released in the Arctic, and polar bears released in Antarctica, would they most likely (without human intervention) die quickly? The climates are different, the prey is different, there are slightly more daylight days on the north pole, ect.

[Bored chemist]

What would happen if polar bears and penguins swapped habitats?
The folk at the antarctic research stations would discover they haven't enough guns.

[Petrochemicals]

Penguins would more than likely fill the ecological niche of the now extinct Great Auk  (Pinguinus impennis)

https://en.m.wikipedia.org/wiki/Great_auk

[Pseudoscience-is-malarkey (OP)]

Penguins would more than likely fill the ecological niche of the now extinct Great Auk (Pinguinus impennis)

There's a conspiracy theory that the Great Auk are still around.

[Bored chemist]

There's a conspiracy theory that

Conspiracy theories should be discussed under psychology, rather than  Plant Sciences, Zoology & Evolution.

[paul cotter]

Or in the subforum "that can't be true".

[alancalverd]

there are slightly more daylight days on the north pole, ect.

Can you substantiate this?

[Petrochemicals]

Also polar bears would have difficuly during the winter months as there is no nearby land masses to move to so there will probably be a lack of food and probably be annoyed they had missed all the penguins.

[Petrochemicals]

Penguins would more than likely fill the ecological niche of the now extinct Great Auk (Pinguinus impennis)

There's a conspiracy theory that the Great Auk are still around.

Yes, obviously as they where very elusive and difficult to catch. Just like the Dodo, Elephant bird, Aurochs.