Elon Musk, the founder of SpaceX, emphasizes the urgency of colonizing Mars to safeguard humanity's future. In a recent interview with Fox News host Jesse Watters, Musk highlighted the inevitable demise of Earth due to the sun's gradual expansion. He stated, "Eventually, all life on Earth will be destroyed by the sun. The sun is gradually expanding, and so we do at some point need to be a multiplanet civilization, because Earth will be incinerated." 

Musk elaborated that as the sun ages, it will become brighter and hotter, leading to the loss of Earth's atmosphere and the boiling away of oceans within a few hundred million years. Ultimately, in about five billion years, the sun will expand into a red giant, engulfing and destroying Earth.

To counter this existential threat, Musk advocates for the establishment of a self-sustaining colony on Mars, viewing it as a form of "life insurance" for humanity. He believes that becoming a multiplanetary species is essential to ensure the long-term survival of human civilization. SpaceX's development of the fully reusable Starship rocket is central to this vision, aiming to make Mars colonization economically feasible.