Explainer: Topsy-turvy weather comes from polar vortex

It's as if the world has been turned upside-down, or at least its weather. You can blame the increasingly familiar polar vortex, which has brought a taste of the Arctic to places where winter often requires no more than a ...

Partisan polarization helps Congress pass bills: study

While political polarization in the United States is the worst it has been in years, new research from Michigan State University and the Max Planck Institute for Demographic Research suggests that having a partisan—and ...

Manipulating electron spin using artificial molecular motors

Artificial molecular switches and machines have undergone rapid advances over the past several decades. Particularly, artificial molecular motors are highly attractive from the viewpoint of chirality switching during rotational ...

A microlaser emitting helical light

Researchers recently demonstrated the realization of an integrated microlaser based on a novel design that emits light in chiral modes, thus producing corkscrews of light. An object is said to be chiral if it can be distinguished ...

The taming of the light screw

DESY and MPSD scientists have created high-order harmonics from solids with controlled polarization states, taking advantage of both crystal symmetry and attosecond electronic dynamics. The newly demonstrated technique might ...

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