> If we assume that ... these molecules are preserved over time (a reasonable assumption—nitrogen is relatively inert),

But they are not inert. Single UV photon can break single N2 molecule bond.

Elemental N is highly reactive and will form new N2 molecule pretty fast, but that is NEW and different molecule!

N2 is not stable over period of 2000 years under constant exposure to solar UV radiation!

I googled study fees for that university. $69000 per year plus expenses for accommodation, food and books.

After you finish such school, you should be top level motivated professional with highly lucrative job lined up. If you drop quarter of million dollars for paper, just to discover at end you need to "reinvent yourself", you are probably highly highly privileged person, or just not so smart.

18 years old kids need to hear this speech. Not students before graduation!