Ending it all
INR --- | ---
D 2
Death for a civilisation can arrive in many forms
- Civilisations can destroy their environment
- pollution
- overuse of natural resources
- the greenhouse effect and overheating
- overpopulation
- annihilation
- Cosmic catastrophes - rare, but possible
- Comet impact
- Asteroid impact
- nearby supernova
- Universal death - inevitable
- the Sun's death
- stellar death
- universe winds down

The Second Law of Thermodynamics