The Antarctic continent remains a frontier for exploration and discovery. As such, NSF investments in Antarctic Science support a broad portfolio of research across a spectrum of interlinked disciplinary areas. This research advances understanding of biota and physical systems operating in the Antarctic region and adjacent seas through field, laboratory, modeling, and theoretical work encompassing terrestrial, marine, cryospheric, atmospheric, and space settings. Research is supported across a broad spectrum of disciplinary areas in response to proposals from the scientific research community. Proposals advancing research through synthesis, data and sample re-use, modeling, and development of predictive tools are encouraged. Support is also provided for research that capitalizes on unique features of the Antarctic continent, and its atmosphere, for scientific research. Proposals Accepted Anytime.