Interesting Engineering on MSN15 天
Researchers develop rare earth-free high power electric motors using copper
Texas A researchers have developed a groundbreaking electric motor using copper instead of rare Earth materials.
Stylist3 个月
11 women on what it’s like to have the coil removed (and the contraception they use instead)
plenty of women swear by the device as a fuss-free means of contraception. But what happens when it’s time to get the copper or hormonal coil removed? That’s something you never really think ...