Scientists have discovered a strange energy source at the center of the Milky Way that could be linked to a different type of dark matter.Large clouds of positively charged hydrogen gas in the Central Molecular Zone (CMZ) indicate a source of energy different from cosmic rays.The study suggests that dark matter could be lighter than previously believed, with tiny particles colliding and ionizing hydrogen gas.This discovery may help explain the mysterious '511-keV emission line' and could change the way scientists search for dark matter.