Fiber optic cables transport petabytes of data every second around the world — scientists say they could also save lives by detecting tsunamis early

Scientists at the National Physical Laboratory (NPL) have discovered a novel technique that can turn undersea power and telecom cables into arrays of environmental sensors, opening the door to extensive ocean monitoring. 

The findings, published in Science Magazine, could revolutionize the way we monitor our planet by providing real-time environmental data from the seafloor.