did the calcium in your bones and iron in your blood come
from? From stars! Stars are like factories that turn hydrogen
atoms formed in the Big Bang into heavier elements, including
most of the stuff that you’re
Here’s how it works: Nuclear reactions
inside stars fuse hydrogen atoms to make helium, helium
to make carbon, and so on through elements as heavy as
iron. Anything heavier than iron is created when high
mass stars blow up in enormous explosions called supernovae.
These violent events seed space with all the elements,
which then serve as building blocks for a new generation
of stars—and eventually planets and people.