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Ground Zero on Sept. 17, 2001.
Credit: U.S. Navy
By Natalie Wolchover
Many 9/11 conspiracy theories revolve around explosions that were seen and heard in the World Trade Center's Twin Towers prior to their collapse. Despite scientific investigations that have explained the processes that brought down the skyscrapers, some conspiracy theorists suggest the plane impacts were just red herrings, to distract from the fact that 9/11 was an "inside job" — that explosives had been implanted earlier in the World Trade Center buildings and were what really brought them down.
Now a materials scientist has come up with a more scientific explanation for the mystery booms, and says his model of the Twin Towers collapse leaves no room for conspiracies. "My model explains all the observed features on 11th September: the explosions, molten metal coming out of the window, the time passing between the crash and the collapse, the fact that the explosions took place in a floor below the place it was burning, and the rapid collapse," Christen Simensen of SINTEF, a research organization in Norway, told Life's Little Mysteries.
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