Are asteroids humanity’s ‘greatest challenge’?

Are asteroids humanity’s ‘greatest challenge’? June 28, 2017 by Mariëtte Le Roux via Phys.org Throughout its 4.5-billion-year history, Earth has been repeatedly pummelled by space rocks that have caused anything from an innocuous splash in the ocean to species annihilation. When the next big impact will be, nobody knows. But the pressure is on to predict—and intercept—its arrival. “Sooner or […]

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