Neither did until I saw the clip in this article >"People look at a tree and think it comes out of the ground, that plants grow out of the ground, " he says,

Neither did until I saw the clip in this article >"People look at a tree and think it comes out of the ground, that plants grow out of the ground, " he says, but "if you ask, where does the substance [of the tree] come from? You find out ... trees come out of the air!" https://www.npr.org/sections/krulwich/2012/09/25/161753383/trees-come-from-out-of-the-air-says-nobel-laureate-richard-feynman-really https://www.npr.org/sections/krulwich/2012/09/25/161753383/t...