I'm tempted to say Scotch Modern, but I'm not sure what it's gonna look like on screen...

For a science & techy site I would go with more modern looking fonts like Neo Sans, Neo Tech, Soho Gothic, Stag, Klavika, Karbon, Geogrotesque …

Thanks for the suggestions. Here is a crude mock up of what the homepage will look like with the them I am using.

With this theme, I will be using the selected font in the header and down below in the small pictures. For the rest of the headings and body text, I will need to select a complimentary websafe font.

In that case, don't forget about Titillium. At least give it a try, it's free after all.

Hmmm - Titillium is nice but I am almost leaning towards a typewriter type font.
Something as simple as american typewriter or maybe typewriter basix.
Thoughts?

Considered CP Mono, Vitesse, and Forza?

If you're after typewriter styles, you can find some at F25. As I understand it, they are gratis/free for non-commercial use.