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says new study – CNN
Dinosaurs wiped out by asteroid as powerful as 10 billion WWII atomic bombs, says new study
The 7.5-mile (12-km) wide asteroid struck the Earth 66 million years ago and caused 75% of life on the planet to become extinct, according to research led by the University of Texas and published in the PNAS journal. It is thought the event triggered wildfires over 900 miles away, as well as sparking a devastating …