Absolute zero is often thought to be the coldest temperature possible. But now researchers show they can achieve even lower temperatures for a strange realm of "negative temperatures." Oddly, another ...

Exotic, ultracold states of matter are challenging physicists to draw on expertise from atomic, condensed-matter and plasma physics, and causing a few surprises along the way The ultracold world has ...

If you want to reduce the friction between tiny objects, just increase the mass of the atoms at one surface, say researchers in the US. Heavier atoms vibrate at lower frequencies than their lighter ...

Believe it or not, cold does not actually exist. What you’re experieincing when you experience cold, is the absence of heat. Temperature is the energy of clashing atoms. A cubic meter of deep space ...

Static electricity works because electrons are strongly attracted to protons, right? But, in atoms, electrons are right there, next to the protons in the nucleus. Why don’t the electrons zip directly ...