The company has not yet announced a date for the start of passenger flights but is selling tickets for a ride aboard SpaceShipTwo at $250,000 a seat. Commercial service is not expected to debut before 2017.
The Boeing Co. marked its centennial on Friday with plans to sharpen its focus on innovation, including ambitious projects for supersonic commercial flight and a rocket that could carry humans to other planets.
A new study says the planet's water might not be drinkable. Worse, it might not even exist. A team of scientists from the University of Arizona looked more closely into those dark streaks called "recurrent slope linae" or RSL in an effort to figure out their origin.