New insight: microorganisms should exist at greater depths than previously estimated - up to 75 km below the surface (or even deeper) instead of 10 km, as was considered.
Mad idea: these organisms might cause earthquakes.
Relation to the EU: perhaps the triggering/release mechanism is telluric currents, as electroautotrophism seems to be a good candidate for energy production in ultra-deep subsurface.
Many-many more details in my paper:
https://eartharxiv.org/bae7t/