The International Ocean Discovery Program (IODP) is now accepting applications for scientific participants on Expedition 376 Brothers Arc Flux aboard the JOIDES Resolution. Expedition 376 will investigate the fundamental, interrelated processes governing subseafloor hydrothermal activity at Brothers volcano, southern Kermadec arc. The primary objectives are to (1) Characterize the subsurface, magma-derived volatile phase for testing models predicting the existence of either a single-phase gas or a two-phase brine-vapor; (2) Explore the distribution of base and precious metals and metalloids at depth as well as the reactions that have taken place during their precipitation along fluid migration pathways to the seafloor; (3) Quantify the mechanisms and extent of fluid-rock interaction, and what this implies for the mass flux of metals and metalloids to the ocean as well as the role of magma-derived carbon and sulfur species in acting as agents for those fluxes; and (4) Assess the diversity, extent, and metabolic pathways of microbial life in an extreme, acidic, and metal-toxic (sub)volcanic environment. The expedition will occur from 5 May through 5 July 2018. Opportunities exist for researchers (including graduate students) in specialties including (but not limited to) sedimentologists, petrologists (igneous/metamorphic/sulfide), structural geologists, paleomagnetists, petrophysicists, borehole geophysicists, microbiologists, and inorganic/organic geochemists. To learn more about the scientific objectives of Exp. 376, life at sea, and how to apply to sail, please join us for a web-based seminar on Wednesday, March 15, 2017 at 1:00 pm EDT (register). U.S.-affiliated scientists interested in participating in this expedition should apply to sail through the U.S. Science Support Program, by visiting http://usoceandiscovery.org/expeditions. The deadline to apply is April 1, 2017.