A NASA mission will send twin spacecraft to Mars to learn what happened to the Red Planet's ancient, thick atmosphere.

Should you go all out in bursts or settle in for the long haul? Experts explain which ride style helps you build more stamina in the saddle.

The way we speak about time tends to strongly imply that the passage of time is some sort of real process that happens out ...

A new theory-based approach provides access to the minute transverse motion of quarks within protons. Nuclear physicists have developed a new theoretical framework that allows them to calculate a ...

Black holes, regions of spacetime in which gravity is so strong that nothing can escape, are intriguing and extensively ...