Science or Fiction
Item #1 Earth is the only world (planet, dwarf planet, or moon) in our solar system with >10% nitrogen in its atmosphere.
Item #2 The human body is 3.3% nitrogen by mass.
Item #3 No plant can fix its own nitrogen, but a symbiotic relationship with nitrogen-fixing bacteria has evolved many times, and also been evolutionarily lost many times.
Skeptical Quote of the Week.
‘Science is not a set of facts. It’s not an ideology. It’s just a system that humans created that is really, really good at uncovering truth.’ - Hank Green