On15, NASA's MESSENGER mission came to an end when the spacecraft intentionally crashed into the surface of Mercury. [‘On ...

Mercury has long been cast as the solar system’s burnt-out rock, a relic too small and too close to the Sun to hold many surprises. That caricature is now collapsing. New analysis of NASA’s MESSENGER ...

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The First Church of Christ, Scientist, and we’ve always been transparent about that. The church publishes the ...

As NASA fought to catch up to the Soviet Union in the space race, they selected a Navy veteran as the first astronaut. But ...