I think the DNA strand is cool, but perhaps a little thinner might be the best.

Yeah, this is a straight C&P from the wallpaper, so the DNA is longer and doesn't overpower them quite as much in that one. Ooh, math and physics... perhaps... I might have an idea for that now. *jots it down*

And I'm way behind too! I finally caught up on the first week of the genficathon (except for maybe one story), only to fall utterly behind in week two.