Four astronauts are making an unexpected return to Earth from the International Space Station after one crew member suffered a 'serious medical condition.' This marks the first time in the station's 25-year history that a mission has been cut short for medical reasons. The affected astronaut's identity and condition remain confidential, but the individual is reported to be stable, with the decision to evacuate made out of caution. The crew undocked in the Dragon Endeavour spacecraft and are expected to splash down off the California coast. The incident has also led to the cancellation of a planned spacewalk, and three astronauts remain aboard the station. NASA continues to prioritize crew safety as it looks toward the eventual decommissioning of the station in the coming years.