Also Natural Scientist. Pronounced "Gnat Ski" or "Nazi" depending upon attitude of the speaker.
Cambridge doesn't feel that students are worked hard enough in other universities. Thus, rather than offering separate Biology, Physics and Chemistry courses (for example), it offers them all at once.
Of course, this being Cambridge, it would be better referred to as UnnaturalScience. Especially the ones who then go on to do research into telepathy and morphic fields, like [Rupert Sheldrake] (originally Clare, now fellow of Trinity).