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Earth prepares for a close encounter with the 'Green Comet;' not seen since the Stone Age

Earth prepares for a close encounter with the 'Green Comet;' not seen since the Stone Age

A comet is streaking back our way after 50,000 years. NASA says the dirty snowball last visited during Neanderthal times. It will come within 26 million miles of Earth.

Pbs.org, Benzer haberler