The "cold" prefix in this case refers to dark matter that is slow-moving in relation to the speed of light and doesn't interact with itself. The alternative is "hot," and self-interacting ...

Rapid temperature flips from hot to cold extremes have increased across the world, according to a new study published in ...

The halo is more extended that astronomers originally thought, and contains enough hydrogen gas to resolve the problem of the ...

"In general, this pattern of cold East and warm West will continue for a week ... AccuWeather meteorologists say. The string of hot, dry days will also boost the spring wildfire risk in the ...