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By Phineas Rueckert
Last year, scientist Stephen Hawking gave humans a shelf-life of 1,000 more years on Earth.
Apparently, 2017 hasn't been to his liking—as Hawking shaved another 400 years off that prediction.
The world-renowned scientist said Tuesday that he believes humans will only last another 600 years before Earth becomes a "sizzling ball of fire" that marks the end of humanity, The Sun reported.