Scientists Are Inching Closer to Figuring Out How Heavy Dark Matter Really Is TOM METCALFE, LIVESCIENCE 5 FEBRUARY 2021 Scientists are finally figuring out how much dark matter – the almost imperceptible material said to tug on everything, yet emit no light – really weighs. The new estimate helps pin down how heavy its particles could be – with implications for what the mysterious stuff actually is.
The research sharply narrows the potential mass of dark matter particles, from between an estimated 10^minus 24 electronvolts (eV) and 10^19 Gigaelectron volts (GeV) , to between 10^minus 3 eV and 10^7eV – a possible range of masses many trillions of trillions of times smaller than before.