mass

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. The findings could help dark … Read more