Scientists have been studying dark matter, which makes up about 85% of all matter, for decades due to its gravitational effects.A cosmic energy phenomenon in the Milky Way's Central Molecular Zone hints at a new type of dark matter.High ionization levels in hydrogen gas at the galactic core challenge current theories on dark matter interactions.The study in Physical Review Letters proposes lighter dark matter particles, different from traditional WIMPs, causing ionization.New dark matter particles could be below 100 MeV and generate electron-positron pairs leading to ionization in gas clouds.The research shifts focus from WIMPs to sub-GeV particles for dark matter investigations.Observations at the galactic center suggest a different approach to studying dark matter's influence on cosmic surroundings.The proposed low-mass dark matter particles could explain the 511-keV emission line linked to positron annihilation in the Milky Way.This study opens up new possibilities for dark matter research and calls for rethinking detection methods.By analyzing data from observatories, scientists aim to redefine our understanding of dark matter and its effects on the universe.