Most diffuse baryons. including the circumgalactic medium (CGM) surrounding galaxies and the intergalactic medium (IGM) in the cosmic web. remain unmeasured and unconstrained. Fast radio bursts (FRBs) offer an unparalleled method to measure the electron dispersion measures (DMs) of ionized baryons. https://www.markymarkscott.com/product-category/foot-file/