The sun won't die for 5 billion years, so why do humans have only 1 billion years left on Earth?
Friday, February 13, 2015 - 08:30
in Astronomy & Space
In a few billion years, the sun will become a red giant so large that it will engulf our planet. But the Earth will become uninhabitable much sooner than that. After about a billion years the sun will become hot enough to boil our oceans.