I haven’t been posting every time I gave a talk, so here is a sporadic update. I contributed a talk to the 2021 April APS meeting. This talk is a status update on work done in collaboration with Alex Saffer and Shammi Tahura, both at UVA. The topic is how to compute the energy content of gravitational waves in Hassan-Rosen bimetric gravity, a.k.a. bigravity. There’s no publicly available recording, but you can see my slides here.