6. Web Finds Carbon Dioxide and Methane on K2-18B Nothing excites scientists more than evidence of life somewhere else in the universe. With the help of the web telescope, new observations have been made that show the presence of carbon dioxide and methane on planet K2-18B, an exoplanet. This planet has been of great interest and a subject of many studies since the Hubble days. This planet is a high-sian planet. This means it has a hydrogen-rich atmosphere and a water-covered surface. Other features of this planet point to the fact that there is a high probability of finding life on it. The planet exists in the habitable area of its star.