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Framed, Chapter 2: 'I will get you': How a PTA mom became the target of a revenge campaign
Science Now

Dan Rothman

MIT professor of geophysics Daniel Rothman stands next to part of the Xiakou formation in China. His right hand rests on the layer that marks the time of the end-Permian mass extinction event. Samples from this formation provided evidence for large amounts of nickel that were spewed from volcanic activity at this time, 252 million years ago.
Dan Rothman
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