NASA shares mid-sized robotic lunar lander concept with industry

As NASA presses forward with the agency's mission to the Moon, Mars and beyond, the development of top-tier technology is critical to success. With emphasis on lunar exploration and scientific investigation, the desire to ...

Smog in Iran shuts schools, universities

Air pollution forced the closure of schools and universities in parts of Iran on Saturday, including Tehran, which was cloaked by a cloud of toxic smog, state media reported.