There is now a Mastodon instance for publishing scientists: FediScience.
Everyone is welcome from PhD student to professor, as well as researchers from outside of academia. You are welcome to stay afterwards, but it is also easy to change to another server.
There will be a lot of science talk on this server, but there is no need to only talk science
https://fediscience.org/invite/j6X8z7qF
Boosts are appreciated to let others know about this new instance.