Most pulsar radio emissions are spectrally broader and noisy — not banded so cleanly like the Crab Pulsar. (An NASA image of the Crab Nebula seen by the James Webb Space Telescope.) Credit: NASA, ESA, CSA, STScI, Tea Temim (Princeton University); Image Processing: Joseph DePasquale (STScI) For more than 20 years, astronomers have been puzzled by a striking pattern of bright, evenly spaced stripes in the radio waves coming from the Crab Pulsar, the dense remnant of a supernova recorded by