Scintillating insights into PSR J0737−3039A and the interstellar plasma of the Gum Nebula from MeerKAT. - Askew, J; Reardon, D J; Shannon, R M; Bailes, M; Camilo, F; Corongiu, A; Kramer, M; Lower, M E; Parthasarathy, A; Possenti, A (Monthly Notices of the Royal Astronomical Society, 2026)