An additional two years’ of effort has provided more about M87
https://www.haystack.mit.edu/news/astronomers-image-magnetic-fields-at-the-edge-of-m87s-black-hole
https://news.mit.edu/2021/astronomers-image-magnetic-fields-edge-m87s-black-hole-0324
https://twitter.com/search?q=m87&ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Esearch