Simple, my hair was brick red to copper until I was about 19. Then the hair on my head turned almost brown. Everything else (beard down) stayed red. Thus partial red haired. (Still burn in the sun, but am able to develop a tan, so I guess I'm a day walker.)

Anecdotal evidence (i.e. my life) would say this is false. But then again that is a very small n.

So how does titanium react to terahertz radiation that doesn't penetrate much more than skin?

Psychiatrists provide more than just medication. A good psychiatrist provides a balance of counseling and medical services.

They have to inform you if they do. Most just take notes.

Psy D.'s can prescribe in many states, and psychologist often work in tandem with nurse practitioners in order to provide prescribing services. Also, more than 80% of all mental health care in the US is provided by social workers, not psychiatrists or psychologists.

Without the windows key there would only be two modifier keys (alt and control). Mac keyboards have three modifier keys (command, control, and option), and each is used quite frequently. Thus, it is nice to have the windows key, even though it has the wrong graphic printed on it.