TIL Mars' Olympus Mons is the solar system's largest known volcano, spreading more than 600 kilometers across with slopes so gentle that a summit view would feel like a tilted plain while its vast base disappears beyond the nearby Martian horizon
Astronauts on the International Space Station see flashes with their eyes closed as cosmic rays pass through the eye and turn space radiation into brief sparks of light
China's Tianwen-3 mission aims to drill two meters into Mars, return 500 grams of rock by 2031, and beat NASA and ESA to the first samples from another planet