alt Hacker News> In fact, biological systems produce no metals
I'm going to be very pedantic and point out a counterexample: https://en.wikipedia.org/wiki/Scaly-foot_gastropod
> In fact, biological systems produce no metals
I'm going to be very pedantic and point out a counterexample: https://en.wikipedia.org/wiki/Scaly-foot_gastropod
Is greigite a metal? It is definitely a more interesting mineral, I'll give you that.