Something's afoot in the ocean off the Palos Verdes Peninsula, and it's drawing out the detective instincts of scientists. Call it the case of the missing DDT.
Over decades, tons of the pesticide flowed through LA County's sewers. It settled into the world's largest underwater toxic hotspot, but in recent tests, that contamination has all but vanished. KPCC's Molly Peterson talked with researchers working to crack the case.