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What Is Ammonium Nitrate, the Chemical That Exploded in Beirut?
The blast injured thousands and killed at least 78 people
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To get to the roots of disasters like this one, investigators rely on video footage, documents, interviews and other evidence
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Originally published in August 1946
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Algorithm Removes Water from Underwater Images
Why do all the pictures you take underwater look blandly blue-green? The answer has to do with how light travels through water. Derya Akkaynak, an oceangoing engineer, has figured out a way to recover the colorful brilliance of the deep...
