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**K2-18b: A Potential Water World with Signs of Life?**

#### **Introduction** K2-18b is one of the most intriguing exoplanets discovered in recent years. Located about **120 light-years away** in the constellation Leo, this distant world has captured the attention of astronomers due to its potential **habitable conditions** and possible **biosignatures** in its atmosphere. Discovered by NASA’s **Kepler Space Telescope** in 2015 and later studied in detail by the **Hubble Space Telescope** and **James Webb Space Telescope (JWST)**, K2-18b represents a new class of planets that could harbor life—or at least the right conditions for it.