Actually scientists have predicted that anywhere between 1.5 to 3.75 billion years (around-ish) from now, the Earth will move from the zone we are in now into the "hot zone" and Earth will no longer be habitable.
This might be wrong, some guy in my class gave a presentation on it, but I thought it was interesting at least.
This might be wrong, some guy in my class gave a presentation on it, but I thought it was interesting at least.