01/08/2026
Something every scout should know? Where do trees come from? The substance of the tree? Its mass? And particularly the parts of a tree that are not water? Does it come from the ground around the tree, sucked up by its roots? We learn as children how trees live. And we learn that trees inhale carbon dioxide and exhale oxygen, just as we inhale oxygen and exhale carbon dioxide. But we also learn that we eat, putting stuff in our mouths, and that this stuff is how we grow heavy and tall. And so too, we might imagine, that a tree "eats" the earth around it through its roots, and so grows upwards using the stuff in the earth that its roots can reach. Isn't it so? An excellent exercise in experiential STEM is to find a great tree and stand next to it and ask, "*if* the tree grows out of the stuff in the ground, why isn't there a great depression in the ground where all the stuff of the tree came from?"
Richard Feynman, here, encourages you to pay attention and look for what you can't explain, and to use your imagination when you can't explain what you see. He also reminds us that we can see physics at work in nature, and we should not forget that nature *is* physics. And that to stand fully in awe of nature, one should also learn to view it through the lens of physics. https://www.youtube.com/watch?v=ITpDrdtGAmo
Derek Muller from Veritasium, here, is also asking the same simple questions to grown adults who have never been invited to stand next to a tree, and to look it up and down, and examine the ground around it, and to ask where they think all the "stuff" of the tree came from. https://www.youtube.com/watch?v=2KZb2_vcNTg
Now! High quality version at https://www.youtube.com/watch?v=P1ww1IXRfTAPhysicist Richard Feynman talks more about jiggling atoms and heat, and about what fi...