Abstract: We discuss how due to neutrino mass there is a general relativistic effect in the delay time for neutrino bursts from cosmologically distant sources. In principle this would permit a measurement of the acceleration parameter q of cosmology in a manner totally different both theoretically and instrumentally from the classical method. Also we briefly discuss the possibility that in a universe with time-dependent constants, particles could arrive at the earth with slightly different properties than those for local particles.

Host: J. Feng