How Walruses and Polar Bears Survive in the Arctic
In How Walruses and Polar Bears Survive in the Arctic, narrator Sir David Attenborough shows walruses gathered on low-lying islands, where they nurse their young after giving birth on sea ice. Meanwhile, a male polar bear, weakened after seven days at sea and having lost half his weight over the summer, swims ashore in search of food. However, the massive walruses, the largest seals in the world with tusks over 3 feet (1 meter) long, prove to be a tough challenge. This video is excerpted from BBC’s Planet Earth, a breathtaking documentary series that highlights the natural wonders of our planet.
Lesson Express
Q: Why do walruses gather on low-lying islands?
A: They gather there to nurse their young after giving birth on sea ice.
Q: Why is it hard for the polar bear to hunt the walruses?
A: The walruses are huge, weighing over a ton, and have long tusks, making them difficult to hunt.
Q: What happens to the polar bear after seven days at sea?
A: The polar bear is exhausted, having lost half his weight by the end of summer, and struggles to find food.
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