Pulsars are rapidly spinning neutron stars, the collapsed cores of once massive stars that ended their lives as supernova explosions. In this book, Geoff McNama

Clear and accessible introduction to the concept of time examines measurement, historic timekeeping methods, uses of time information, role of time in science a

Richard Feynman once quipped that "Time is what happens when nothing else does." But Julian Barbour disagrees: if nothing happened, if nothing changed, then tim