An important technique for discovering and characterizing planets beyond our solar system relies upon measurement of weak Doppler shifts in the spectra of host stars induced by the influence of ...

The increase in service on Philadelphia’s busiest transit line comes as a response to changing rider habits, SEPTA officials said. A train moves along the Market-Frankford Line. (Matt Rourke/AP Photo) ...

Recently, on-chip comb generation methods based on nonlinear optical modulation in ultrahigh-quality-factor monolithic microresonators have been demonstrated, where two pump photons are transformed ...

Metro Transit will open its latest rapid bus line on Saturday, with the new B Line bringing faster and more frequent service to the Lake Street corridor in Minneapolis and along Selby and Marshall ...