>>8929402Theres alot of Fermi filters to get through..
Cosmological Filters
Star formed outside of galactic habitable zone.
Lack of accretion disk prevented planet formation.
Cosmic background radiation too high.
System forms more than two stars.
Solar output is stable.
Planet is obliterated after formation.
Life Filters
Accretion disk is low in metallic content.
Planet outside of habitable zone.
Organic compounds fail to self-replicate.
Core is not geologically active.
System lacks Jovian planets.
Planet lacks atmosphere.
Planet lacks liquid water.
Planet is tidally locked with star.
Planet becomes ejected from system.
Extreme tidal effect.
Van-Allen radiation envelopment.
Sapience Filters
Planet lacks a large moon.
Planet lacks oxygen.
Life doesn't reproduce sexually.
Planet has no axial tilt.
Life never develops K-selection strategy.
Lifeforms lack sentience.
Lifeforms lack risk aversion.
Technological Filters
Planet is non-terrestrial.
Extremely Low-Gravity
Lifeforms lack dexterity in manipulation.
Planet lacks high-energy fuel reserves.
Lifeforms lack abstract, rational or inductive reasoning.
Lifeforms are not omnivorous.
Lifeforms are not social.
Lifeforms lack formal language.
Lifeforms are not predatory.
Societies lack agriculture.
Apocalyptic Filters
Massive extraterrestrial impact event.
Climate change. (Natural or Induced).
Gamma ray burst.
Food chain collapse.
Massive celestial body intrusion.
Rouge pulsar.
Galactic plane irradiation event.
Grey Goo sceneario
Matter-Antimatter anihilation.
Massive seismic disruption.
Evolutionary regression.
Orbital ejection of planet.
Extraterrestrial predation.
