Greater Good, the online magazine of the Greater Good Science Center, reports on scientific findings into the roots of individual and collective well-being, positive relationships, and compassionate behavior—what they call “the science of a meaningful life.” They are looking for experienced journalists or subject-matter experts, and don't accept articles on spec, only pitches. According to their pitch guide, their base rate is 25 cents per assigned word. For certain types of pieces, they pay a flat rate: $220 for a research brief; $300 for a Q&A with an interview subject; $200-300 for pieces originally published elsewhere that require revision, and $300 for personal essays. To learn more, refer to this page.