Scientists have created what they say is the world's smallest untethered flying robot, by taking a unique approach to its ...

A team of scientists in South Korea has developed a new way to make high-performance permanent magnets without using costly heavy rare earth elements. This breakthrough could help reduce costs and ...

It is also grade school science to show that neither an electromagnet nor a permanent magnet ... aluminum has a copper ring embedded in it. The coil is fed with AC. The magnetic field from the ...