Physic- 36
Why aren't there penguins at the north pole?

I've got this answer from the net:

This is so as there's no land at the north pole and the ice melts and constently moves around.

Why penguins don't live with polar bears?

Penguins are fabulous swimmers but they’re rather slow and awkward on land. Nonetheless, they spend considerable lengths of time on land during the breeding season, remaining for long periods in the colony. Fortunately, there are few predators on the southern islands or the beaches and ice of Antarctica. In the north, it would be different—in the north, there are Polar Bears, Arctic Foxes and other predators, including people. Any penguin colony that started up in the Arctic would likely quickly fall prey to these carnivores. Indeed, the few human attempts to establish penguin colonies in the Arctic have all failed.Read more: "North Pole Penguin: Why Don’t Penguins Live in the Northern Hemisphere?" -

http://bird-habitats.suite101.com/article.cfm/north_pole_penguin#ixzz09LG3jJe7
source: http://wiki.answers.com/Q/Why_aren't_there_any_penguins_at_the_North_Pole