YouTuber builds 250-watt handheld laser 50,000x stronger than legal pointers. Can melt metal, create rubies-but exists in ...

For all the remarkable improvements we’ve seen in desktop 3D printers, metal printers have tended to stay out of reach for hackers, mostly because they usually rely on precise and expensive laser ...

Scientists from the federally funded Argonne National Laboratory in Illinois and the University of Virginia have developed a ...