Stephen Hawking predicts that humanity might not survive another 1,000 years "without escaping beyond our fragile planet," reports the Associated Press. Hawking, now 71, spoke at an assembly at Cedars-Sinai Medical Center, where he visited a stem cell lab studying Lou Gehrig's disease.

"Despite his diagnosis, Hawking has remained active. In 2007, he floated like an astronaut on an aircraft that creates weightlessness by making parabolic dives.Hawking rattled off nuggets of advice: Look up at the stars and not down at your feet. Be curious.

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"However difficult life may seem, there is always something you can do and succeed at," he said.

Dr. Robert Baloh, director of Cedars-Sinai's ALS program who invited Hawking, said he had no explanation for the physicist's longevity."

Photo: Cedars-Sinai, Eric Reed, more photos here[via Yahoo News]

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