as people around the world prepare to switch off their lights, technicians at the National Ignition Facility in California are switching on the world’s most powerful laser. originally designed to test nuclear weapons without actually blowing one up, the giant facility focuses 192 lasers onto a tiny sphere to recreate conditions inside an H-Bomb. now, the principle is being used to attempt controlled fusion – the ultimate clean energy source. if they can crack it, we’ll never have to worry about turning off the lights again
_image: Laser Bay 2 at the National Ignition Facility
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