Ink and Equations

Real science, written as stories, poems, satire and speeches

Ink and Equations

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Real science, written as stories, poems, satire and speeches.

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    Most of You Was Made Inside a Star

    A poem about where your atoms came from, and why the stars that made them stopped at iron.

    By The editors You've read this

    Cite

    The editors. “Most of You Was Made Inside a Star.” Ink and Equations, Poetry, 11 Oct 2026. /poetry/most-of-you-was-made-in-a-star/

    Fig. 1 Apart from hydrogen and a little helium from the Big Bang, the atoms in your body were made by nuclear fusion inside stars, which builds heavier nuclei step by step up to iron, and were scattered across space when those stars shed their outer layers or exploded.

    The hydrogen in every tear
    is older than the oldest stone:
    it came from the beginning, here
    before a single star had shone.

    But carbon, threaded through your cells,
    and oxygen in every breath,
    were cooked in stars, in burning shells,
    and scattered at the stars’ own death.

    A star lives by a squeeze: it packs
    four hydrogen nuclei to one
    of helium, and what it lacks
    in mass comes out as light: a sun.

    Then, when its hydrogen runs thin,
    it squeezes helium to make
    the carbon in your blood and skin,
    the oxygen your lungs will take.

    The biggest stars go further, then,
    through neon, silicon, and on
    to iron, where it stops, for when
    it fuses iron, the profit’s gone.

    With nothing left to hold it high,
    the core falls in, and in that blast
    the star flings out across the sky
    the elements it made, at last.

    So iron, riding in your blood,
    and holding oxygen you need,
    was forged before the Earth was mud,
    before there was a Sun, or seed.

    You’re not the child of just one place:
    your atoms have been round before;
    you’re made of the beginning’s trace,
    and stars that aren’t there any more.

    A small experimentDraw yourself in elements
    Time 20 minutes You need Squared paper, Four coloured pens or pencils
    1. Mark out a block of 10 by 10 squares. Each square is 1 per cent of your mass.
    2. Colour 65 squares for oxygen, 18 for carbon, 10 for hydrogen and 3 for nitrogen. Leave the last 4 for everything else: calcium, phosphorus, iron and the rest.
    3. Now draw a second block for atoms instead of mass. Colour about 62 squares hydrogen, 24 oxygen, 12 carbon and 1 nitrogen.
    4. Label each colour with where it was made: the Big Bang, or a star.
    What's going on?

    The two pictures look very different because hydrogen atoms are so light: they are most of your atoms but little of your weight. Your second drawing is mostly Big Bang; your first is mostly stars.

    Unpacked: go deeperWhy Stars Stop Making Elements at IronThe stardust poem says stars fuse their way up to iron and stop, "for when it fuses iron, the profit's gone". Here's the single curve behind that line, which also explains nuclear power stations and why a star's death takes less than a second.

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    Sources

    1. NASA Science, "Stars: How do stars form and evolve?"
    2. Burbidge, E. M., Burbidge, G. R., Fowler, W. A. and Hoyle, F., "Synthesis of the Elements in Stars", Reviews of Modern Physics (1957)

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