UEA scientists say the Earth has around 3 billion years of habitable life left.
Andrew Rushby, from the university's school of environmental sciences, said:
– Andrew Rushby
We estimate that Earth will cease to be habitable somewhere between 1.75 and 3.25 billion years from now.
After this point, Earth will be in the 'hot zone' of the sun, with temperatures so high that the seas would evaporate. We would see a catastrophic and terminal extinction event for all life.
Of course conditions for humans and other complex life will become impossible much sooner.
Humans would be in trouble with even a small increase in temperature, and near the end only microbes in niche environments would be able to endure the heat.