The U.S. National Science Foundation (NSF) is offering the Mathematical and Physical Sciences Ascending Postdoctoral Research Fellowships (MPS-Ascend) to support postdoctoral researchers who aim to broaden participation among historically underrepresented groups in the mathematical and physical sciences. Eligible candidates must be U.S. citizens or permanent residents, have completed their doctoral degree, and present research plans that align with the NSF's Divisions of Astronomical Sciences, Chemistry, Materials Research, Mathematical Sciences, or Physics. This fellowship program is crucial for fostering diversity and developing future leaders in these fields, with a total funding amount of $10 million available to support approximately 50 awards, each ranging from $100,000 to $300,000. Proposals must be submitted by the fellowship candidates directly to NSF, and interested individuals can find more information and contact support at grantsgovsupport@nsf.gov.