Those are static wicks. They help dissipate static electricity from the aircraft. https://en.wikipedia.org/wiki/Static_wick

He even had an aircraft part named after him! https://en.wikipedia.org/wiki/Cooper_vane

And if you’re already doing the basics, go get checked out.

Here’s a free online course about best practices for getting quality rest. Geared toward aviation but has practical content. https://www.faasafety.gov/gslac/ALC/CourseLanding.aspx?cID=174

Meh, needs cocktail olives. So, 3.5/5