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According to the world famous physicist, Stephen Hawking, the world is at a risk from many dangers and claims that the only way to protect us all is by leaving the planet. However, we have not reached a point where we can safely leave the planet and establish life elsewhere. Stephen Hawking points us that one day, in the distant future, civilization will annihilate itself that could wipe humanity from the face of the earth.

According to BBC, professor Stephen Hawking has discussed some situations that can whip the human civilization. Some of these scenarios include development of nuclear warfare and artificial intelligence, to genetically engineered virus that can spread across the world easily and kill everybody. The 74-year-old Cambridge Professor said, "Although the chance of a disaster to planet Earth in a given year may be quite low, it adds up over time, and becomes a near certainty in the next thousand or ten thousand years," he said.

However, professor Hawking points out that there is a glimmer of hope and the best way to escape this mass annihilation is by leaving the planet and venturing off into the space. Simply put, he wants humans to become inhabitants of not just Earth but many other worlds. "By that time (meaning the future) we should have spread out into space, and to other stars, so a disaster on Earth would not mean the end of the human race," he explained, reported stgist.com

So when can we move away from Earth into other planets of the solar system? Professor Hawking says that the prospect of self-sustaining colonies in space cannot be established for the nest 100 years. He also recommended that the science community should be very careful in this period.