Page 106 - Allah's Gentle Artistry

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Beneath the skin of polar bears, a layer of fat 11 cen-
timeters (4.3 inches) thick serves as insulation. This lets
them swim continuously for 100 kilometers (62 miles) in
icy water at a speed of 10 kmph (6.2 mph). Polar bears are
also equipped with a very acute sense of smell; able to
smell carrion—a dead whale, for example—from as far

as 32 kilometers (20 miles) away, and can sniff out seal
dens covered with snow. 16