Scientists now think the universe may be filled with tiny “primordial” black holes, relics from the first moments after the Big Bang, drifting through Earth by the thousand each year and passing through our homes and bodies without leaving a trace. These minuscule singularities may even be the missing dark matter, a possibility that could reshape how we understand the universe’s hidden mass.Scientists now think the universe may be filled with tiny “primordial” black holes, relics from the first moments after the Big Bang, drifting through Earth by the thousand each year and passing through our homes and bodies without leaving a trace. These minuscule singularities may even be the missing dark matter, a possibility that could reshape how we understand the universe’s hidden mass.