1) What makes a dog a great animal for detecting scents? How do they compare to humans in their ability to detect scents?

Dogs devote lots of brain power to interpreting smells. They have more than 100 million sensory receptor sites in the nasal cavity as compared to 6 million in people, and the area of the canine brain devoted to analyzing odors is about 40 times larger than the comparable part of the human brain.

Explanation:

How do I explain this? Just read it out in my head and wrote it here.

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