A new type of bacteria called 'Candidatus Kryptonia' has been discovered in hot geothermal springs. This bacteria was hidden before because of how it was studied. By analyzing a lot of data, scientists found this new bacterial group and even created high-quality genomes for four of its genera. 'Candidatus Kryptonia' seems to rely on other microbes for some nutrients, and it has potential partners in the environment. This discovery shows that there is still a lot to learn about the diversity of microbial life on Earth.