Marcus Chown

@marcuschown

Writer. Books include Tweeting the Universe, We Need to Talk About Kelvin, Quantum Theory Cannot Hurt You & Solar System for iPad

The iron in your blood, the calcium in your bones- all were forged in stars that lived & died before the Earth was born

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1447 days ago

The iron in your blood, the calcium in your bones- all were forged in stars that lived & died before the Earth was born

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