Elon Musk's latest tweet: 'Expanding consciousness beyond Earth and ultimately among the stars is a fundamentally beautiful goal.' My thoughts: Upload human consciousness to the cloud, first send AI robots to Mars to establish humanity's second home, then gradually migrate humans to Mars in batches. If accidental death or natural aging occurs, transfer the consciousness uploaded to the cloud into AI robots, achieving a carbon-based + silicon-based fusion immortal lifeform, continuing development on Mars and expanding to outer space planets.