Space stations with artificial gravity that will allow humans to travel deep into the Solar System are on the horizon.

New study assesses where light-powered spacecraft propulsion technology currently stands.

(Ianm35/iStock/Getty Images Plus) The Solar System is one of the comforting constants of human existence. No matter what else ...

It's the third of a generous five Saturdays in the month of November. What did we do to deserve such a bounty of days off? In the last week, we reported on hundreds of developments in science. Here is ...