Anybody have a non paywall link to the paper?
https://web.archive.org/web/20260711174045/https://www.pnas....
that's just background/abstract, might be better to access journals through your library
alt Hacker News
https://web.archive.org/web/20260711174045/https://www.pnas....
that's just background/abstract, might be better to access journals through your library