Humans in Space
It is important for the human race to spread out into space for the survival of the species. 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.
Steven Hawking (The Lucasian Professor of Mathematics at the University of Cambridge)
Mars Exploration Rover / Image credit: NASA/JPL-Caltech/Cornell
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