Why do penguins live at the South Pole, but not the North?

Have you ever thought, why do penguins live at the South Pole but not the North? What is the scientific research on why penguins live where they live? Although penguins don't get as far south as the South Pole, they live in the freezing cold seas that surround Antarctica. Out of 18 penguin species, 7 of them live in Antarctica. Penguins live almost entirely in the Southern Hemisphere, with a few exceptions like the Galapagos penguins, living just slightly in the Northern Hemisphere. The 18 different species of penguins are found in Antarctica, South Africa, Australia, New Zealand, Argentina, Chile and the Galapagos Islands in Ecuador. They do well in Antarctica, because they have feathers that look like tiles on a roof, to make a sealed waterproof coat, which they wear over their fluffy layers. Being nice and plump also helps keep them warm. They would have a really hard time relocating up to the Arctic, in the north of the planet, because they would have to swim through the warm seas around the equator to get there. Although the Galapagos and African penguins have adopted themselves to withstand much hotter temperatures, yet they could not make the shift farther north, towards the Arctic. One reason can be, the Galapagos Islands, are surrounded by hundreds of miles of open ocean. The adult penguins could swim far north, but not the babies. Moreover, penguins are not adapted to move fast on land. In the Antarctica, they don't have to worry about being hunted by polar bears and arctic foxes who are real threats in far north. All these reasons combine to make a compelling case for why there are no penguins in the Northern Hemisphere. Since penguins won't move over large distances on land, it is likely that they are either scared off by curious humans or killed by predators as they will make an easy meal for them. So, maybe it's better if penguins stay south and remote for now. Thanks for watching!