At the Starmus Festival, scientific conference in Trondheim, Professor Stephen Hawking warned that human race must start leaving Earth within 30 years to avoid being left with no space caused by over-population.
Reuters
"I am convinced that humans need to leave earth. The Earth is becoming too small for us, our physical resources are being drained at an alarming rate." said Hawkings.
Stephen Hawking said: "Firstly, the Earth is under threat from so many areas that it is difficult for me to be positive - the threats are too big and too numerous."
He warned that the Earth is becoming too small to sustain the ever growing population. But the only way to veer away from this threat is for the world to unite. If we don't take the situation seriously, he said, "we will still perish, because with current technology we have no way of reaching the nearest potentially habitable planet which is billions of light years away."