Scientists at the Nevada Test Site said they generated a current equal to roughly four times all the electrical power on Earth. The current, which created pressures in materials millions of times greater than normal, was part of an experiment to better understand nuclear weapons. The experiment was conducted on Wednesday at the test site's Atlas Pulsed Power Facility by scientists from Los Alamos National Laboratory in New Mexico, During the few millionths of a second it operated, the generator discharged nearly 19 million AMP of current, it said.