Aboard one of the most-advanced research ships in the world, on a seemingly unremarkable day, David Valentine decoded unusual signals underwater that gave him chills. As he scanned the seafloor with a deep-sea robot, he came across a trail of eerie-looking barrels that no one had seen before. He spent years sounding the alarm, but calls to the government went nowhere. He finally messaged Rosanna Xia, a reporter at the L.A. Times, who unearthed a startling truth: as many as half a million barrels of DDT waste had been quietly dumped into the...
