A photon
experiences no time and has no 'sense' of distance. It might exist for hundreds
of millions of years, but for the photon, there’s zero time elapsed between
when it’s emitted and when it’s absorbed again. Also, it may travel across
billions of light years, but for the photon, it's same as travelling between
two atoms.
Quarks only
exist in pairs. The energy required to separate two quarks of a pair
spontaneously creates two more quarks, one to partner with each of those you
just pulled apart.
The elements up
to Iron are produced in stars during their "normal" lifetime. The
heavier elements are created in a supernova. The Gold in our
wedding ring, or chain, was formed billions of years ago, during an incredibly
violent super-massive explosion of a gigantic star. There is no other natural
process by which it could have been formed.
We all carry
star dust. Literally.
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