Professor Sudip Bhattacharyya of the Tata Institute of Fundamental Research (TIFR), Mumbai, India, and Professor Deepto Chakrabarty (MIT), an adjunct visiting professor at the same institute, have shown that a population of neutron stars should spin around their axes much faster than the highest observed spin rate of any neutron star. They pointed out that the observed lower spin rates are possible if these neutron stars emit gravitational waves continuously, and hence spin down.