Careers for Science Majors: http://facweb.furman.edu/~jsnyder/careers/careerlist.html
Jobs in Physics, Astronomy and other science fields: http://www.phys-astro.sonoma.edu/advisor/Jobs.html
Occupations for Earth Science Graduates: http://www.uni.edu/earth/careers.html
Fellowships in Science: http://www.science.gov/internships/graduate.html