1 billion years
<In 1 Billion years, there won't be much life left on Earth because the water will be gone.
Uh...where were you planning to hide all that water?
Space/Science » in reply to Re: Martin Rees -
<In 1 Billion years, there won't be much life left on Earth because the water will be gone.
Uh...where were you planning to hide all that water?