Actually, NodeBB is totally free as in beer, if you want to host it yourself
Just check out the Github repo: https://github.com/NodeBB/NodeBB and the installation instruction: https://docs.nodebb.org/installing/os/
@rstoenescu Then you probably also bumped into topics like quantum mechanics, general relativity, parallel universes, string theory etc.
I only started reading about this a couple of years ago. And though I only scratched the surface, it has put tiny life on earth in a complete different perspective. Very fascinating.
