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A bear emerges from dense vegetation and pauses on the shore. It’s early spring, and the young grizzly has only recently roused from hibernation, ravenous and driven. He lifts his head and gazes out across the falling tide to the opposite shore, where forested slopes are close enough to make out individual trees. The bear stands and sniffs the air.
Grizzlies can see about as well as we can, but it’s their olfactory powers—at least 2,000 times more acute than ours—that most likely set them in motion. We’ll never grasp how they perceive the world, let alone what they’re thinking. For some reason, this bear falls back on all fours, ambles away from prime habitat, and wades into the sea.