Users that have reached the “trust level” of “regular” can turn their own posts into wikis that can be edited by almost everyone (except for new users, I guess to prevent spam). Since you (@Gia) are a “regular”, you can do this as well. Click on the icon that looks like three dots on any of your recent posts, then click on the wrench icon, and you will get the option to turn your post into a wiki.
@bugcat, I’ve been making my more recent posts (unfortunately, it does not seem possible for me to edit or convert older posts into wikis) in this thread wikis in case others wished to add to them, or to correct any mistakes. I’m hoping that this thread would be more of a discussion where we all work through life and death shapes together, but I feel like my presentation style in the older posts might have made things more like a series of lectures. So, I’m trying something different to see if that might increase participation.
Update: thank you to @flovo for helping to convert the older posts in this thread into wikis.
Note: I’ve consolidated a couple of older posts into the original post.