An artist's impression of K2-18b, the only known exoplanet believed to have liquid water essential for life. EPA
An artist's impression of K2-18b, the only known exoplanet believed to have liquid water essential for life. EPA
Water discovered in atmosphere of potentially habitable planet
Eight times the mass of Earth and twice as big, the planet named K2-18b orbits in its star's 'habitable zone'
The National
September 12, 2019
