Some scientists insist all dark matter is cold, while others argue that there is more than one type. While CDM isn’t saying this invisible matter is totally motionless, it does not allow for ...

Watch the Video Click here to watch on YouTube Hundreds to thousands of feet below the surface of the ocean, beyond where ...

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Based on the new model, the first of these white dwarf explosions isn’t due for at least 10 1100 years. That’s a 1 followed by 1,100 zeros—a number so big that we don’t have a name for it.

Besides particles like sterile neutrinos, axions and weakly interacting massive particles (WIMPs), a leading candidate for the cold dark matter of the universe are primordial black holes—black ...

To dark matter and dark energy, add dark galaxies — collections of stars so sparse and faint that they are all but invisible. An artist’s depiction of hydrogen gas observed in the galaxy J0613 ...