Through Artemis, NASA astronauts are returning to the Moon in preparation for one day going to Mars. To better prepare astronauts for these long journeys, scientists need to know: How do extended ...

Some experts believe that the solar system's hypothetical ninth planet could be just a few years away from being discovered. If this is the case, how long would it take for humans to send probes to ...

For the past 25 years, the entire living human population has never been on Planet Earth at the same time. That's because, since 2000, at least a few humans have been living aboard the International ...