Hi, I was wondering if anyone could help me better understand the differences in a Theorist and an Experimentalist. My understanding is something like this: Theorists typically spend their time attempting to model a given system abstractly, perhaps first in concept alone and then mathematically or perhaps diving straight into a mathematical model. Experimentalists, while not prohibited from having their own models and ideas about the behavior of a system, spend their time primarily on performing (and improving) experiments to find data. Their efforts would be spent not only on the collection of data, but also on experimental design (kind of like some engineering, maybe?). I don't know that this is accurate, but this is the impression I've been given. From this (probably false) impression, I've decided that Theory is what I would like to go for, but it would probably be good to know what Theorists actually do and what Experimentalists actually do. I was also wondering what kind of REUs exist, since I'm still an Undergraduate student and I would like to find research. I would think they would be experimental in nature, since it would be very difficult to be developed to the extent where a student could be working on theoretical problems, but again I am not sure. Thank you for your time, Elwin ****Edit: Does anyone have any commentary on t'Hooft's guide to becoming a Theoretical Physicst? (http://www.staff.science.uu.nl/~hooft101/theorist.html) I have lots of free time this and the next semester, and I'd like to use it productively.