For decades, one of the biggest challenges of sending humans to Mars hasn’t just been getting there, it’s getting back.

A researcher says he found a possible shortcut to Mars that would halve the time it takes to travel to the planet and back to less than a year.

SAN FRANCISCO -- Venus and Mars, planet Earth's two closest neighbors, have been inching ever closer to each other during the month of July. Monday night, they promise to put on a show, appearing at ...

A rare predawn alignment will bring together Mars, Saturn and a thin crescent moon in the eastern sky on May 14, creating a striking cosmic triangle visible to skywatchers across much of the world.