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Luna asks: Is glue made out of hydrogen and oxygen and water? We zoom all the way down to atoms, the tiny Lego blocks of everything, and discover that water is H2O (two hydrogen, one oxygen). But glue is something else entirely. The real star of glue is carbon, the atom with four little arms that builds long sticky chains called polymers. Without carbon, there’d be no glue, no you, no me, no podcast! Featuring a catchy synth-funk song: ‘Sticky Sticky Polymer.’