Physicist Stephen Hawking says that humans need to start moving off the Earth as soon as possible.
""It is important for the human race to spread out into space for the survival of the species," Hawking said. "Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global warming, nuclear war, a genetically engineered virus or other dangers we have not yet thought of." "
SPACE.com — Hawking Says Humans Must Colonize Space
In order for humans to survive, this is mandatory in the long term. We all live on a planet that is subject to meteor strikes, sun spots/ fluctuations, gamma-ray bursts, and climate changes (heating and cooling). And, we all live here. So, we have put all our eggs in one basket, so to speak.
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