How dogs use smell to see — and save — the world

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There is a dog in Washington state named Tucker, and he can smell orca poop that is floating on the choppy waters of the Puget Sound from more than a mile away.

This is invaluable to the University of Washington biologists who work with the black lab mix, because the feces can tell them about killer whales’ hormone levels, diet and toxins, and that information can help them understand why the region’s killer whale population has dropped. But orca poo floats for just minutes, so people don’t stand a chance to locate it alone.

READ MORE via The Washington Post