Hydrogen is a light, odorless gas, which, given enough time, turns into people. First hydrogen has to turn into helium (in a star), then the helium has to turn into even heavier elements (also in a star), then the heavier elements need to turn into a planet (after the star explodes), then that planet has to produce life (through abiogenesis(we’re actually not quite sure how this specifically happened on earth), and then that life has to turn into people (through evolution).