why r polar bears found only in the N.pole and penguins only in the S.pole given that temp conditions r same?

Question

remember
1. The temperature conditions in both the north as well as the south pole are kept constant; in other words they are taken to be the same
2. If polar bears are artificially migrated to the south pole or the penguins are artificially established in the north pole, they do not survive.

Answer 1

For Polar Bears:
For evolutionists:
First of all, Polar Bears evolved from Brown Bears that where seperated from the other populations by a glacier or possibly something else, trapping them in extreem conditions.
Now, due to these conditions, pressures where quickly placed on them to have them evolve very rapidly into the Polar Bears (by evolutionary standards, meaning it still took several thousand years), due to the fact that the very harsh conditions quickly weeded out Bears that where not so readilly able to survive.
Now, the Bears eventually managed to adapt to the conditions, and find an abundant source of food on the sea ice, consisting of Ringed Seals, and ocasionally some other species of seals, such as Walrus cubs.
And, since Polar Bears evolved up North in this area, they obviously couldn't have started down in Antartica.

Now, the Polar Bears have no method at all of travelling this far south, to reach Antartica, as they would die of heat exhaustion far before then, not to mention they would probably lack any prey item, being used to hunting seals, and such.
And, for the Brown Bears that could have theoretically moved down South, and then go their, and evolve into a Polar Bear-like animal (though, it would probably have multiple distinguishing features, and quite probably a different diet), this is also very unlikely.
The furthest south that the range of Brown Bears has ever been is in Northern Africa, in the form of Atlas Bears, which have been hunted to extininction by Humans in the eighteen hundreds, which is still quite far away from Antartica.
Now, even if they theoretically wheren't hunted to extintion by Humans, and where given the time to be able to travel all the way South to the southern most tip of Africa, they would from their be unable to swim far enough to be able to reach Antartica, and would theirfore still be unable to reach it.
And, if you mention the fact that their are marsupial fossils their, then I will have to mention the fact that know placental animals where down South during those many long years ago before Antartica split off, theirfore they still wouldn't have been down in Antarctica.

For the Creationists:
Polar Bears have a yearly "routine" of waiting during the sumer for the sea ice to freeze, and, then, when the sea ice does begin to freeze, they then swim out to it, and begin their hunting of seals on the sea ice, never traveling out onto the permanent ice, but only on the temporary ice, as, this is the only ice they are able to hunt on, concidering they hunt by smashing a hole in the ice, and waiting for a seal to surface to take a breath, and then pull it out, and the permanent ice would be much to thick for that.
And, in Antartica, it would have to instead then wait down South, where it is colder then it may be up north, or just as cold, meaning that because the Bears are being inactive trying to conserve energy, they may freeze, and theirfore need more insulation.
However, then they would overheet while hunting, etc, out on the sea ice, which is something that should not happen, and may overall cause some stress, etc.
Seeing this, god decided not to put Polar Bears on Antartica.

Penguins:
I don't know enough about Penguins to give much of an answer here, and will therefore leave it to someone else.

EDIT: just to let the person who said something below me, Grizzlies and Polar Bears have already begun to interact, as mentioned in the article "Grizzlies on Ice", which can be seen here:
http://www.nwf.org/nationalwildlife/article.cfm?issueID=80&articleID=1192

And what the below person calls the much meaner animal is actually much less aggressive, and being dominated in the majority of encounters, despite its much larger size, simply due to the differences in aggression.
Willingness to hunt Humans has nothing to do with aggession.

EDIT, once again:
some Grizzly-Polar Bear interactions:
http://www.adn.com/front/story/6415667p-6294323c.html
small female Grizzly (with cubs) chased away three Polar Bears, three of which where 1,000lb Males.
http://abcnews.go.com/Technology/DyeHard/story?id=582243&page=1
Grizzlies, the much smaller animal, are incading the Polar Bear's territory, once again, showing that these smaller animals for some reason (aggresion) seam to be dominating their much larger relatives.

More can probably be found, if requested, though, as one can see, Grizzlies are already beginning to invade the relatively little territory Polar Bears have, so, quite infortunately, unless something is done to stop Global Warming (I'm fairly certain that the Grizzlies wont manage to actually displace Polar Bears from the sea ice, as they are much better adapted for that terrain then the Grizzlies), the great Polar Bears may soon be gone, as they would then either be forced into extinction, being out competed by, as what I presented shows, the more aggressive Grizzly, that actualy dominates them, despite their smaller size, in the majority of encounters (and the Grizzlies would also be much more adept at surviving their, probably having stomachs more capable of digesting vegetation, and, the Grizzlies being able to reach higher speeds, of 35mph compared to the Polar Bear's 25, would be much more readilly able to catch Caribou, or Musk Ox, and would theirfore have an easier time hunting aswell), or being "bred away" by haveing their genes slowly be errased, by "intermingling" with the Grizzlies (which is quite obviously possible, considering the wild Hyrbid Bear found recently, meaning that their is a possibillity that this may occur overtime if both species are forced to live together permenantly,

Have a nice day.

Answer 2

The range of the polar bear is limited by sea ice which they use as a platform to hunt seal, the mainstay of their diet. The destruction of its habitat on the Arctic ice, which may be caused by global warming, threatens the bear's survival as a species; it may become extinct within the century. Signs of this have already been observed at the southern edges of its range. Due to this, it has not been able to migrate to the Antarctic especially given that the Antarctic is surrounded by the Southern Ocean.

Penguins have several species with three species living in the tropics and one which lives in the Galapagos Islands and which does cross the tropics. However, the species that live in the Antarctic are adapted for that climate and could not migrate across the tropics and temperate zones further north.

In addition, the Arctic is considerably warmer than the Antarctic as it is located over water which keeps temperatures warmer. That is why the Arctic can support more life. The Antarctic is over land and has high mountains which further reduces temperatures.

Answer 3

I along with everybody else don't really know the absolute correct answer to your question but in my humble opionion, since the Antarctic Circle actually gets much colder than the Arctic circle. I suspect that the extreme conditions that have existed on the south pole for ages is why there are no ploar bears there.

Answer 4

they cant fly or swim around the globe .so they hang around where the climate suits them .

how ever the south pole is land ,and the pinguins may end up walking around Atlantis .if it all the ice,melts away

but the North pole is just ice on the water and this ice is melting at a very fast rate , the polar bears may end up in Canada and they are a lot meaner than Grizzly bears ,they hunt people for food

Answer 5

Bears did not exist in Africa and South America when Antarctica broke away from them due to continental drift. There were lots of sea birds there, one line of which gave rise to the penguins. This ancestral line apparently did not exist at that time in the far northern hemisphere.

Answer 6

Because of the inability for animals to migrate outside that area, they are in complete isolation and able to develop completely different species of animals.

Answer 7

There are no land animals of any kind in the Antarctic, only sea mammals and birds.

Answer 8

they are at different poles, very far apart.