Why does nose/eyebrow hair lengthen and hair develop on ears as we age?

Subject: Why does nose/eyebrow hair lengthen and hair develop on ears as we age?

Date: Sun Sep 6 00:22:38 1998
Posted by Michael Harshaw
Grade level: teacher/prof
School: No school entered.
City: Haddon Heights State/Province: NJ
Country: USA
Area of science: Development
ID: 905059358.Dv

Message:


As we age, hair develops on ears, and nose and eyebrow hairs lengthen. 
Why?  What triggers this and what prevents it from happening until 
later in life? I assume genes are involved, but what keeps them 
inactive or what makes them active?

Re: Why does nose/eyebrow hair lengthen and hair develop on ears as we age?

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