Interstellar comet 2I/Borisov just doubled-down on its weird mystery

The unexpected contents of an alien comet have left scientists scratching their heads, as the strange chemical properties of 2I/Borisov force experts to rethink what was assumed about neighboring star systems. Observed as it briefly passed through our own solar system in late-2019, 2I/Borisov may only be 3,200 feet long, but its 74,000 miles per hour speed have helped it … Continue reading

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