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| Penguin Numbers Plummeting—Whales Partly to Blame? - National ... Penguin populations are plunging due to a shortage of krill driven by shrinking sea ice and a boom in hungry whales, a new study says. news.nationalgeographic.com/.../110411-penguins-antarctica-... | ||
| Rock Eyes Let Mollusks See - National Geographic Sea creatures called chitons can use beadlike structures made of rock to distinguish shapes of approaching predators, a new study says. news.nationalgeographic.com/.../110414-eyes-rock-crystal-mi... |
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