Magnetic Reference Laboratory will close its doors at the end of the year. The company, founded 51 years ago, makes calibration tapes for analog open-reel recorders. Its co-founder Jay McKnight died ...

Cryptochromes, which fulfill the molecular requirements for sensing the magnetic reference direction, have recently been found in retinal neurons of migratory birds (Mouritsen et al., PNAS ...

To extract that kind of information, engineers typically calibrate their sensors using reference magnetic fields, which have a known direction, as guides of a sort. They compare data from sensors with ...