Researchers are studying TRAPPIST-1e, an Earth-sized exoplanet located in the habitable zone of its star. The exoplanet is being examined to determine its potential for habitability, with some studies suggesting it may not have a Venus- or Mars-like atmosphere, while others question the presence of a methane atmosphere. The planet is considered one of the most Earth-like worlds found so far, and further research, including observations by NASA's Webb telescope, may shed more light on its potential to support life.