mastodon.online is one of the many independent Mastodon servers you can use to participate in the fediverse.
A newer server operated by the Mastodon gGmbH non-profit

Server stats:

11K
active users

One of my students did their final project for CS Ethics on decarbonizing the power grid and made a working model of a utility pole as part of their presentation, like the transformer worked and everything. I love teaching engineers