The 27.5-million-year cycle of geological activity

Geologic activity on Earth appears to follow a 27.5-million-year cycle, giving the planet a 'pulse,' according to a new study published in the journal Geoscience Frontiers.

How do social media influence ethnic polarization?

Those who deactivated their Facebook profiles report a lower regard for other ethnic groups, and this effect was more prevalent among people living in more ethnically homogenous areas, shows a new study of users in Bosnia ...

States laws limit local control over guns, favor gun rights

The majority of U.S. states have passed laws preserving state authority over firearms policies—and preventing local communities from passing their own—but at the same time have refrained from enacting statewide gun-control ...

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