5 things to know for Feb. 3: Arctic blast, Spy balloon, Ukraine, Tobacco, Eye drops
By Alexandra Meeks, CNN While you were sleeping this week, many sky watchers in the Northern Hemisphere were up overnight trying to catch a glimpse of a rare green-hued comet passing by Earth. Take a look at some of the photos they captured of the celestial object swinging through our cosmic neighborhood. Here’s what else
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