After spending 9 months aboard the International Space Station, NASA astronaut Sunita Williams is set to return to Earth on March 19, 2025. While space missions push the boundaries of human exploration, they also take a toll on the human body. ISRO Scientist Mahendar Pal Singh sheds light on the serious health challenges astronauts may face upon re-entry, including cardiovascular and respiratory issues, reduced bone density, and muscle loss due to prolonged exposure to microgravity.