Researchers have designed a new Optically Pumped Magnetometer (OPM) sensor for magnetoencephalography (MEG). The sensor is smaller and more robust in detecting magnetic brain signals and ...

This persnickety number determines the strength of magnetic fields. It figures in everything from motors and generators to audio speakers. Oh, and without it we’d live in eternal darkness.

The muon’s magnetism is still strong. Its most precise measurement yet is in line with a series of earlier results — and seals an embarrassing discrepancy with decades of theoretical calculations that ...