Every year, The Open Notebook offers a paid, part-time fellowship program for early-career science journalists. During the course of this fellowship, fellows work with a mentor to plan, report, and write articles for publication at The Open Notebook and become part of the TON editorial team. This ten-month program offers fellows the opportunity to explore their career interests and passions and to sharpen their skills as part of a talented, supportive, diverse community of past and present fellows and mentors. The fellowship is open to early-career science journalists with fewer than three years of regular professional science writing experience.