Do you have a good sense of smell?
How do you know if your sense of smell is a particularly sensitive one, or not?
Is it important to have a keen [= highly developed] sense of smell? Why or why not?
When is your sense of smell the most sensitive, or strongest, and why do you think so?
Does your sense of smell help you in any way? Does it ever hurt you? If so, how?
Do certain smells trigger memories or feelings for you? If so, when and how?
The original article is The Circadian Clock in Your Nose. [circadian = recurring naturally on a twenty-four-hour cycle]