In a new discussion, Elon Musk set an ambitious goal for Starship: landing humans on Mars within four years. But there’s a ...

Paul Amadeus Dienach had been teaching the German language in Greece. Dying of tuberculosis, he wanted to return home to Switzerland. Before he left, he gave hundreds of pages of handwritten notes to ...

NASA has long used underwater training for astronauts, and Deep’s technology could be a game-changer for space missions. If ...