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WHEN the food of the grizzly bear becomes 

 scarce, he goes to bed and sleeps until a 

 reasonable supply is available, even though he 

 waits five months for it. He feasts on the fullness of 

 the land during the summer and wraps himself in a 

 thick blanket of fat. When winter comes on, he digs 

 a hole and crawls in. This layer of fat is a non-con- 

 ductor of cold and in due time is drawn on for food. 

 One autumn day I visited the Hallett Glacier 

 with a professor from the University of Chicago. 

 After exploring one of the upper crevasses, we 

 stood looking down the steep slope of the glacier. 

 New snow had fallen a few days before, and a soft, 

 slushy coating still overlaid the ice. The professor 

 challenged me to coast down the steep, snow-lubri- 

 cated ice-slope. We seated ourselves on this soft, 

 slippery snow, and he gave the word "Go." Just as 

 we slid away, we saw at the bottom of the slope, 

 where we were soon to be, a huge grizzly bear. I 

 wish you might have seen our efforts as we tried to 

 change our minds on that steep slope! The grizzly 

 8l 



