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        Can Comets be Deadly? | Comet Encounter: Chapter 6

        However unlikely it may be, a comet does pose a threat to people on Earth if it were ever to impact our planet; yet the paranoia caused by comet encounters has been a much more real reaction over the years. An analysis of Ison-only a week away from entering the harsh atmosphere of the sun-shows us that the comet may actually hold more secrets about life on our planet, not death. Many scientists believe that the water that we see on Earth today once fell to our planet from comets, like Ison, that are rich in water molecules.

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