vicgrinberg, 
Just stumbled over this lovely article about my friend Erin and her work to decipher the timing of #BlackHoles!
▶️ https://www.quantamagazine.org/to-see-black-holes-in-detail-she-uses-echoes-like-a-bat-20240212/
(May possibly give some background context on our recent paper on Cyg X-1 that I posted about yesterday and that Erin was also part of the team for 😊)
