There are topics, pictures and instructions that are not suitable for 11 year olds but are for adults. Consider the wiki entries on certain matters of extreme violence, ideology or adult culture.
This is very interesting to read. I am in Australia and quite interested in this investment thesis although I’m not an investment professional. What are the best things to read about the demand Supply mismatch?
Came here to make sure that Art of problem-solving and beast Academy are mentioned. They are fantastic. My son is deep into art of problem-solving after having finished beast Academy.
I think the second mocks the inclination of humans to reflexively admire everything that high status (ie rich) people do or say. It is similar to this amusing Yiddish saying: https://www.yiddishwit.com/gallery/sing.html
I have been looking at trees my entire life, and never thought to even think about this “plumbing” ratio. What a lovely example of how Leonardo combined mathematics and observations.