Elon Musk has warned that Earth will eventually become uninhabitable as the sun expands and intensifies. According to NASA and Tōhō University researchers, by the year **1,000,002,021**, rising solar temperatures will evaporate Earth’s oceans and deplete oxygen, making life unsustainable. In about **5 billion years**, the sun will enter its red giant phase, likely swallowing Mercury, Venus, and possibly Earth.
Musk emphasized the need for a “multi-planet civilization,” calling Mars “life insurance” for humanity. While NASA confirms the sun’s inevitable fate, it reassures that Earth has **5 billion years** before catastrophic changes occur. Musk’s comments highlight long-term existential risks—and the urgency of space colonization.
