Aliens and dinosaurs by Roz

Point in time: 65 Million years ago
An asteroid hit the earth. Scientists have found hard evidence in massive chunks of rocks that the asteroid that doomed the dinosaurs was powerful enough to trigger wildfires, tsunamis and blast so much dust into the atmosphere that it blocked out the sun — and they estimate the impact was as powerful as 10 billion atomic bombs of the same sized used in World War II. Researchers said that studying the rocks from the impact zone shed new light on the longer-lasting effects of the asteroid impact that wiped out 75% of life on the planet. ABCnews

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