Some questions about penguins. Do polar bears eat penguins?

Seals and killer whales are natural enemies of penguins, and sea lions in South Africa, Australia-New Zealand and new sea lions near Antarctica also prey on penguins. It didn't eat for that long because of its thick body fat, but many of them would starve to death. Maybe they offended God. They go to the same place to give birth every year, which is far from the sea. All species hatch hermaphroditically except emperor penguins. When mating, penguins are very lively and loud, but when hatching, they are silent. The mortality of eggs and young birds depends on the climatic conditions, the percentage of young birds in the breeding population and the destruction of the enemy, which is generally 40% of the total number of eggs laid. 6? 580%。 After laying eggs, females often wander to the ocean for food, about 10? 6? Come back after 520 days to replace the male birds, and then rotate with each other for a week or two. But the female emperor penguin has to walk 80 miles from the colony to the ocean. 6? 5 160 km (50？ 6? 5 100 mile) and cannot return before the end of the 64-day incubation period; At this time, during the severe winter in Antarctica, male emperor penguins hatch eggs on their feet and live on the fat stored in their bodies. If a penguin can meet a polar bear, I think it has another natural enemy.