The Fall and Rise of the Doppler Effect | RealClearScienceOf all the eponymous discoveries that emerged from 19th-century physics—Young's fringes, the Biot–Savart law, the Fresnel lens, the Carnot ...

MADISON — What if the speed of light is a constant only most of the time? What if gravity sometimes pushed instead of pulled? Scientists are increasingly asking what would seem like far-out questions ...