habitability is not something humans should take for granted.
The planet remains our only proven home.
Conclusion
Scientists have long understood that the Sun will eventually become brighter, hotter, and ultimately transform into a red giant.
New computer models provide estimates suggesting that Earth’s atmosphere could undergo dramatic changes in roughly one billion years, potentially causing the extinction of most complex life long before the Sun reaches its red giant stage.
Elon Musk has used this distant future as one reason for advocating a multiplanetary civilization.
His vision is to
