What Animals Have the Best Sense of Smell?

 

Most people know that dogs have an exceptional sense of smell, but how do they rate among other animals? A recent study of a selected group of mammals (including us humans) came up with some interesting results (Who knew rodents had such powerful noses?). Scientists examined the number of olfactory receptor genes (genes devoted to smell) in the study group. Here are the results, from best sense of smell to weakest:

 

1. Elephant

2. Rat

3. Cow

4. Mouse

5. Horse

 

6. Dog

7. Guinea Pig

8. Rabbit

9. Human

10. Chimpanzee

11. Marmoset

 

12. Macaque

13. Orangutan

 

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