There's a player trying to get a sample of saguaro wood so they can measure some of its material properties empirically and add those to the game. And that's just one small part of some very large, recent threads researching real-world stuff to improve the game's model.

Someone actually went through about a couple of hundred random types of stone and wood to find out more information on them and input proper data for them, rather than using the defaults for wood and stone.

That thread is somewhere on the Suggestions forum.