>FROM AFRICA TO ALASKA
THERE IS NOTHING THAT TV DOES better than the nature show, as illustrated by two programs this week. Echo of the Elephants on PBS (Sun., March 14, 8 p.m. ET) details 18 months in the life of a 45-year-old elephant matriarch, Echo, and her extended family. These gray giants exhibit remarkable tenderness and devotion to each other. The following night the Discovery Channel studies the annual cycle of a less sociable species: the grizzly bear. The subjects of The Great Bears of Alaska (9 p.m. ET) emerge from hibernation in the spring, gorge themselves for six months on vegetation, salmon and even cubs of their own kind, then head back into the mountains for the long sleep.
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