This incredible exoplanet, K2-18b, is more than 2.5 times the size of Earth — and might be completely covered in water. Scientists believe it’s a potentially habitable world, with conditions that could support liquid oceans and maybe even alien life. Orbiting a distant red dwarf star, K2-18b has no visible land — just endless ocean beneath thick clouds. While it's far from Earth, it offers real clues in the search for life beyond our solar system. Every new observation helps us learn more about