Most scientists agree that the impact of an asteroid hitting Earth played a major role in the extinction of dinosaurs but now there's a brand new theory about how exactly that happened.

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Millions Feeling the Heat Around the World
High temperatures continue to affect people in the U.S. and abroad, including in Iran where it reached 152 degrees on Sunday. The southwestern part of the U.S. continues to experience extreme weather after over a week of a heat wave.
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