There are many different ways to monitor the improvements you make as a runner. Paying attention to fatigue levels, breathing ...

This sort of motion is common in galaxies sporting active central supermassive black holes, like the one in the nearby elliptical galaxy M87. Astronomers have measured motion in M87’s ejecta as rapid ...

Amtrak’s new NextGen Acela trains hit the tracks today, and if you frequently commute between Washington, D.C., New York City ...