What scientific topics can retired individuals explore on Physics Forums?

[TechBob]

Hello,

I just signed up, hoping to read interesting information on Physics and related subjects, hopefully things with scientific validity as opposed to some of the drivel that infests the internet.

You'll see by my info that I am retired, so I probably fall somewhere between Coot and Geezer when compared to others here.

 

[Greg Bernhardt]

Welcome to PF!