What does it take to demonstrate a radar system is ready to look through the frozen crust of a distant moon when the ultimate test is impossible on Earth? NASA’s Europa Clipper spacecraft had the ...

Mars is cold, has a very strong radiation environment, no magnetic field, a very low-pressure atmosphere and it’s all carbon dioxide, so you can’t breathe there. And there are no nutrients to grow ...

Add Yahoo as a preferred source to see more of our stories on Google. A test pilot and instructor from Edwards Air Force Base has been selected as one of four volunteers to take part in a yearlong ...

Wringing out clues that could change everything.